[Tree widget]: update media for README on next

[JonasDov]

Part of #1737

• Added table of contents to REAMDE.md
• Updated old screenshots/gifs with v4 equivalent

[Copilot]

Pull request overview

Updates the Tree widget package README to better reflect v4 documentation by refreshing embedded media and adding a navigable Table of Contents.

Changes:

• Replaced the README header image with the updated v4 screenshot.
• Added a Table of Contents linking to major sections/subsections.
• Updated the “Categories tree” section description to reflect the newer hierarchy structure (but introduces a grammar issue).

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[github-actions]

Tree-Widget Next benchmark

Benchmark suite	Current: 23aff15	Previous: 7370036	Deviation	Status
models tree 50k 3D elements search > get search paths	903 ms	872 ms	3.56%	〰️
models tree 50k 3D elements search > get search paths (P95 of main thread blocks)	76 ms	57 ms	33.33%	〰️
models tree 50k 3D elements search > load hierarchy from search paths	111998 ms	114341 ms	-2.05%	〰️
models tree 50k 3D elements search > load hierarchy from search paths (P95 of main thread blocks)	30 ms	108 ms	-72.22%	✅
models tree 50k categories > collect nodes	2935 ms	2974 ms	-1.31%	〰️
models tree 50k categories > collect nodes (P95 of main thread blocks)	113 ms	104 ms	8.65%	〰️
models tree 50k categories > validate initial visibility	1777 ms	1850 ms	-3.95%	〰️
models tree 50k categories > validate initial visibility (P95 of main thread blocks)	0 ms	0 ms	0%	🟰
models tree 50k categories > change visibility	199 ms	198 ms	0.51%	〰️
models tree 50k categories > change visibility (P95 of main thread blocks)	82 ms	52 ms	57.69%	〰️
models tree 50k categories > validate changed visibility	2277 ms	2369 ms	-3.88%	〰️
models tree 50k categories > validate changed visibility (P95 of main thread blocks)	22 ms	27 ms	-18.52%	〰️
models tree 50k 3D elements > collect nodes	44930 ms	45952 ms	-2.22%	〰️
models tree 50k 3D elements > collect nodes (P95 of main thread blocks)	54 ms	64 ms	-15.63%	〰️
models tree 50k 3D elements > validate initial visibility	1498 ms	1414 ms	5.94%	〰️
models tree 50k 3D elements > validate initial visibility (P95 of main thread blocks)	32 ms	0 ms	3200%	〰️
models tree 50k 3D elements > change model visibility	111 ms	109 ms	1.83%	〰️
models tree 50k 3D elements > change model visibility (P95 of main thread blocks)	21 ms	0 ms	2100%	〰️
models tree 50k 3D elements > validate changed model visibility	2057 ms	2083 ms	-1.25%	〰️
models tree 50k 3D elements > validate changed model visibility (P95 of main thread blocks)	0 ms	0 ms	0%	🟰
models tree 50k 3D elements > change category node visibility	466 ms	474 ms	-1.69%	〰️
models tree 50k 3D elements > change category node visibility (P95 of main thread blocks)	41 ms	44 ms	-6.82%	〰️
models tree 50k 3D elements > validate changed category visibility	1395 ms	1494 ms	-6.63%	〰️
models tree 50k 3D elements > validate changed category visibility (P95 of main thread blocks)	0 ms	0 ms	0%	🟰
models tree 50k 3D elements > validate per-model category override	1350 ms	1512 ms	-10.71%	✅
models tree 50k 3D elements > validate per-model category override (P95 of main thread blocks)	0 ms	0 ms	0%	🟰
models tree 50k 3D elements > change element visibility	38 ms	38 ms	0%	🟰
models tree 50k 3D elements > change element visibility (P95 of main thread blocks)	0 ms	0 ms	0%	🟰
models tree 50k 3D elements > validate changed element visibility	2079 ms	2262 ms	-8.09%	〰️
models tree 50k 3D elements > validate changed element visibility (P95 of main thread blocks)	53 ms	53 ms	0%	🟰
models tree 50k 3D child elements with different categories and excluded classes > collect nodes	63470 ms	64147 ms	-1.06%	〰️
models tree 50k 3D child elements with different categories and excluded classes > collect nodes (P95 of main thread blocks)	61 ms	75 ms	-18.67%	〰️
models tree 50k 3D child elements with different categories and excluded classes > validate initial visibility	2111 ms	2081 ms	1.44%	〰️
models tree 50k 3D child elements with different categories and excluded classes > validate initial visibility (P95 of main thread blocks)	37 ms	0 ms	3700%	〰️
models tree 50k 3D child elements with different categories and excluded classes > change visibility	53 ms	52 ms	1.92%	〰️
models tree 50k 3D child elements with different categories and excluded classes > change visibility (P95 of main thread blocks)	0 ms	0 ms	0%	🟰
models tree 50k 3D child elements with different categories and excluded classes > validate changed visibility	5429 ms	5643 ms	-3.79%	〰️
models tree 50k 3D child elements with different categories and excluded classes > validate changed visibility (P95 of main thread blocks)	87 ms	99 ms	-12.12%	〰️
models tree 50k 3D child elements with different categories and excluded classes > collect nodes	64608 ms	64147 ms	0.72%	〰️
models tree 50k 3D child elements with different categories and excluded classes > collect nodes (P95 of main thread blocks)	52 ms	75 ms	-30.67%	〰️
models tree 50k 3D child elements with different categories and excluded classes > validate initial visibility	2330 ms	2081 ms	11.97%	🚨
models tree 50k 3D child elements with different categories and excluded classes > validate initial visibility (P95 of main thread blocks)	115 ms	0 ms	11500%	🚨
models tree 50k 3D child elements with different categories and excluded classes > change visibility	53 ms	52 ms	1.92%	〰️
models tree 50k 3D child elements with different categories and excluded classes > change visibility (P95 of main thread blocks)	0 ms	0 ms	0%	🟰
models tree 50k 3D child elements with different categories and excluded classes > validate changed visibility	7086 ms	5643 ms	25.57%	🚨
models tree 50k 3D child elements with different categories and excluded classes > validate changed visibility (P95 of main thread blocks)	69 ms	99 ms	-30.30%	〰️
categories tree 50k subCategories search > get search paths	1054 ms	1093 ms	-3.57%	〰️
categories tree 50k subCategories search > get search paths (P95 of main thread blocks)	87 ms	99 ms	-12.12%	〰️
categories tree 50k subCategories search > load hierarchy from search paths	5347 ms	5900 ms	-9.37%	〰️
categories tree 50k subCategories search > load hierarchy from search paths (P95 of main thread blocks)	52 ms	61 ms	-14.75%	〰️
categories tree 50k subCategories > collect nodes	5421 ms	5782 ms	-6.24%	〰️
categories tree 50k subCategories > collect nodes (P95 of main thread blocks)	30 ms	37 ms	-18.92%	〰️
categories tree 50k subCategories > validate initial visibility	1047 ms	1015 ms	3.15%	〰️
categories tree 50k subCategories > validate initial visibility (P95 of main thread blocks)	0 ms	0 ms	0%	🟰
categories tree 50k subCategories > change visibility	351 ms	348 ms	0.86%	〰️
categories tree 50k subCategories > change visibility (P95 of main thread blocks)	23 ms	0 ms	2300%	〰️
categories tree 50k subCategories > validate changed visibility	1103 ms	1091 ms	1.10%	〰️
categories tree 50k subCategories > validate changed visibility (P95 of main thread blocks)	28 ms	25 ms	12%	〰️
categories tree 50k categories and excluded classes > collect nodes	111504 ms	112862 ms	-1.20%	〰️
categories tree 50k categories and excluded classes > collect nodes (P95 of main thread blocks)	112 ms	132 ms	-15.15%	〰️
categories tree 50k categories and excluded classes > validate initial visibility	5438 ms	5285 ms	2.89%	〰️
categories tree 50k categories and excluded classes > validate initial visibility (P95 of main thread blocks)	53 ms	59 ms	-10.17%	〰️
categories tree 50k categories and excluded classes > change visibility	822 ms	808 ms	1.73%	〰️
categories tree 50k categories and excluded classes > change visibility (P95 of main thread blocks)	60 ms	57 ms	5.26%	〰️
categories tree 50k categories and excluded classes > validate changed visibility	5450 ms	5590 ms	-2.50%	〰️
categories tree 50k categories and excluded classes > validate changed visibility (P95 of main thread blocks)	32 ms	37 ms	-13.51%	〰️
categories tree 50k categories and excluded classes > collect nodes	113680 ms	112862 ms	0.72%	〰️
categories tree 50k categories and excluded classes > collect nodes (P95 of main thread blocks)	148 ms	132 ms	12.12%	〰️
categories tree 50k categories and excluded classes > validate initial visibility	5609 ms	5285 ms	6.13%	〰️
categories tree 50k categories and excluded classes > validate initial visibility (P95 of main thread blocks)	55 ms	59 ms	-6.78%	〰️
categories tree 50k categories and excluded classes > change visibility	889 ms	808 ms	10.02%	🚨
categories tree 50k categories and excluded classes > change visibility (P95 of main thread blocks)	73 ms	57 ms	28.07%	〰️
categories tree 50k categories and excluded classes > validate changed visibility	7766 ms	5590 ms	38.93%	🚨
categories tree 50k categories and excluded classes > validate changed visibility (P95 of main thread blocks)	35 ms	37 ms	-5.41%	〰️
classifications tree 50k classifications search > get search paths	2294 ms	2371 ms	-3.25%	〰️
classifications tree 50k classifications search > get search paths (P95 of main thread blocks)	194 ms	196 ms	-1.02%	〰️
classifications tree 50k classifications search > load hierarchy from search paths	62715 ms	64434 ms	-2.67%	〰️
classifications tree 50k classifications search > load hierarchy from search paths (P95 of main thread blocks)	22 ms	26 ms	-15.38%	〰️
classifications tree 50k classifications and excluded classes > collect nodes	32994 ms	33461 ms	-1.40%	〰️
classifications tree 50k classifications and excluded classes > collect nodes (P95 of main thread blocks)	47 ms	62 ms	-24.19%	〰️
classifications tree 50k classifications and excluded classes > validate initial visibility	2763 ms	2895 ms	-4.56%	〰️
classifications tree 50k classifications and excluded classes > validate initial visibility (P95 of main thread blocks)	0 ms	0 ms	0%	🟰
classifications tree 50k classifications and excluded classes > change visibility	166 ms	160 ms	3.75%	〰️
classifications tree 50k classifications and excluded classes > change visibility (P95 of main thread blocks)	25 ms	0 ms	2500%	〰️
classifications tree 50k classifications and excluded classes > validate changed visibility	3366 ms	3459 ms	-2.69%	〰️
classifications tree 50k classifications and excluded classes > validate changed visibility (P95 of main thread blocks)	85 ms	74 ms	14.86%	〰️
classifications tree 50k classifications and excluded classes > collect nodes	33738 ms	33461 ms	0.83%	〰️
classifications tree 50k classifications and excluded classes > collect nodes (P95 of main thread blocks)	64 ms	62 ms	3.23%	〰️
classifications tree 50k classifications and excluded classes > validate initial visibility	2744 ms	2895 ms	-5.22%	〰️
classifications tree 50k classifications and excluded classes > validate initial visibility (P95 of main thread blocks)	0 ms	0 ms	0%	🟰
classifications tree 50k classifications and excluded classes > change visibility	163 ms	160 ms	1.88%	〰️
classifications tree 50k classifications and excluded classes > change visibility (P95 of main thread blocks)	26 ms	0 ms	2600%	〰️
classifications tree 50k classifications and excluded classes > validate changed visibility	3265 ms	3459 ms	-5.61%	〰️
classifications tree 50k classifications and excluded classes > validate changed visibility (P95 of main thread blocks)	49 ms	74 ms	-33.78%	〰️

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