feat: implement PDIP footprint (PDIP-8)#702
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Add pdip as a footprint function reusing the standard DIP layout (0.3in/7.62mm row width, 2.54mm pitch, 0.8mm holes, 1.6mm pads), matching KiCad's PDIP/DIP-8_W7.62mm. - src/fn/pdip.ts: pdip function and pdip_def (reuses dip) - footprinter string support: pdip8 and hyphenated PDIP-8 alias - snapshot tests + KiCad parity test vs DIP-8_W7.62mm (courtyard IoU 99.90%, pads fully overlap)
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Closes #371
Summary
Implements the PDIP (Plastic Dual In-line Package) footprint. PDIP is the standard through-hole DIP layout, so
pdipreuses the existingdipgenerator with its industry-standard defaults (0.3in / 7.62mm row width, 2.54mm pitch, 0.8mm holes, 1.6mm pads, rectangular pin-1 pad).Supported strings:
pdip8/pdip<N>PDIP-8(hyphenated alias, normalized likeSOT-223-5)pdip8_w7.62mm_p2.54mmVerification
tests/kicad-parity/pdip8_kicad_parity.test.ts) comparespdip8againstPackage_DIP.pretty/DIP-8_W7.62mm: courtyard IoU 99.90% and pads fully overlap (boolean-difference snapshot shows complete overlap).tests/pdip.test.ts.bun test→ 437 pass / 0 fail.bun run buildsucceeds.Note: this PR was prepared with assistance from an AI coding agent; dimensions were verified against the KiCad footprint library reference.