Remove Tailwind and simplify CSS build process

- Remove Tailwind CSS and related dependencies (tailwindcss, @tailwindcss/cli, bun-plugin-tailwind)
- Remove unused dependencies (lenis, @paper-design/shaders, three)
- Convert @theme variables to CSS custom properties in :root
- Add minimal CSS reset for browser consistency
- Update server to serve /css/* and /js/* routes directly
- Fix conflicting CSS rules that broke commands section layout
- Delete bunfig.toml (no longer needed without Tailwind plugin)

The site now uses native CSS imports via Bun's built-in bundler,
eliminating the need for separate Tailwind compilation step.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.gitignore

@@ -4,7 +4,6 @@ node_modules/
 # Generated files
 dist/
 build/
-public/css/styles.css
 
 # Build artifacts
 *.log