v3.0.0

• Rewrite component in modern JavaScript with Hooks
• Build with esbuild and support ESM and CJS modules
• Upgrade to React 18 (with React 19 compatibility)
• Add Vitest test suite and GitHub Actions for CI
• Add Biome for linting and formatting
• Replace setTimeout with requestAnimationFrame for smooth 60fps rendering
• Fix canvas rendering bugs and a11y focus outline
• Complete UI overhaul of the demo page