feat(core): add anime.js runtime adapter

[miguel-heygen]

Summary

• Adds a RuntimeDeterministicAdapter for anime.js v4+ alongside existing Lottie, Three.js, WAAPI, and CSS adapters
• Enables frame-accurate rendering of anime.js animations — the adapter converts seek time (seconds) to milliseconds and calls .seek(timeMs) on registered instances
• Auto-discovers running instances via anime.running; compositions can also register manually via window.__hfAnime

Usage in compositions

<script src="https://cdn.jsdelivr.net/npm/animejs@4.0.2/lib/anime.iife.min.js"></script>
<script>
  const anim = anime({
    targets: '.box',
    translateX: 250,
    rotate: '1turn',
    duration: 2000,
    autoplay: false,
  });
  window.__hfAnime = window.__hfAnime || [];
  window.__hfAnime.push(anim);
</script>

Files changed

• packages/core/src/runtime/adapters/animejs.ts — adapter implementation
• packages/core/src/runtime/adapters/animejs.test.ts — 15 unit tests
• packages/core/src/runtime/init.ts — register adapter in runtime init
• packages/core/src/runtime/window.d.ts — add anime and __hfAnime globals

Test plan

• All 15 unit tests pass (bun run --cwd packages/core test -- --run adapters/animejs)
• Build passes (bun run build)
• Pre-commit hooks pass (lint, format, typecheck, commitlint)
• Manual test: render a composition using anime.js animations