fix(icons): stop collapsing multi-path icons in the generator

[kelsos]

Summary

The build-time icon generator was running ~190 lines of hand-rolled SVG path parsing to flatten lucide's per-primitive [tag, attrs] entries into a single concatenated d string. That round-trip rendered badly at small sizes on multi-segment icons — most visibly lu-eye-off, which collapsed to little more than its diagonal slash inside menu rows.

This rewrites the generator (now TypeScript) to:

• pass lucide's default export through verbatim — its shape is already what RuiIcon consumes;
• walk parsed XML for custom SVGs and emit one tuple per renderable primitive (path, rect, circle, ellipse, line, polyline, polygon);
• use fast-glob (already a project dep, used in build-web-types.mjs) instead of two near-duplicate recursive walkers + per-leaf lstat;
• run lucide imports and chunk-file writes in parallel;
• fail fast with a summary if any icon fails to load (was: silent consola.warn + missing export);
• emit a header on every generated chunk that suppresses lint/format/typecheck noise across eslint, prettier, dprint, oxlint, and biome.

RuiIcon.vue is intentionally unchanged — it already iterates components and renders each tuple, so multi-entry output drops in cleanly.

Side effects

• tsconfig.node.json includes src/types/icons.ts so the script can import GeneratedIcon under node16 module resolution.
• README and CLAUDE.md docs corrected: generate:icons → generate-icons, remix-icons → Lucide, clarified that src/icons/ is gitignored.

Test plan

• pnpm typecheck clean.
• pnpm lint — zero errors on the new script.
• pnpm test:run — 69 files / 1069 tests passing.
• pnpm build — emits 4 chunks; multi-path icons now have multiple ["path", ...] entries.
• pnpm generate-icons runs in ~1.7 s end-to-end (parallelized).
• Visual: example app /icons and storybook render lu-eye-off, lu-trash-2, lu-bug, lu-rotate-ccw with all subpaths at both 24 px and 18 px.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.87%. Comparing base (962dd5a) to head (2c15f1c).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #519   +/-   ##
=======================================
  Coverage   84.87%   84.87%           
=======================================
  Files         143      143           
  Lines        5209     5209           
  Branches     1553     1553           
=======================================
  Hits         4421     4421           
  Misses        788      788           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.