ci: Enable MIRI in CI

[EmilyMatt]

Will finally close #446

Stacked on top of these PRs:

• fix: alloc(0) call is UB #442
• fix: No UTF-8 validation happening when portable is disabled #445

And unfortunately requires a PR on value-trait, which seems unmaintained:
simd-lite/value-trait#65

[codecov]

Codecov Report

❌ Patch coverage is 58.33333% with 10 lines in your changes missing coverage. Please review.
✅ Project coverage is 72.11%. Comparing base (c18bb92) to head (b6f1ee2).
⚠️ Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
src/lib.rs	58.33%	10 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #450      +/-   ##
==========================================
- Coverage   72.33%   72.11%   -0.22%     
==========================================
  Files          51       49       -2     
  Lines       11435    11327     -108     
==========================================
- Hits         8271     8168     -103     
+ Misses       3164     3159       -5     

Flag	Coverage Δ
unittests	72.11% <58.33%> (-0.22%)	⬇️

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[Licenser]

Heya @EmilyMatt everything else is merged but the mimir change seems to have broke nightly tests so something is odd here

[EmilyMatt]

Heya @EmilyMatt everything else is merged but the mimir change seems to have broke nightly tests so something is odd here

I believe this cannot be merged until the value-trait is merged and the version bumped since the bug is there

[Licenser]

Oh darn, I'm really behind on catching up.

[EmilyMatt]

Oh darn, I'm really behind on catching up.

All good, its admirable you are even getting to reviewing these :)

[Licenser]

Oh nice miri is working now and catching bugs! This is awesome :D