Fixes#1241
The docs bundle was importing `{ icons }` from lucide-react, which pulls
the entire Lucide icon library (~1 400 SVGs, ~500 kB of JS) into the Next.js
docs bundle even though only nine icons are used in docs frontmatter and
meta.json files.
Replace with a hand-maintained DOCS_ICONS whitelist that imports only the
icons that are actually referenced (BookOpen, ClipboardCheck, Compass,
Container, Download, FlaskConical, Heart, Unplug, Wrench).
To add a new docs icon: import it from lucide-react and add it to the
DOCS_ICONS record. The icon() callback remains the same for callers.
- Deleted the empty middleware file as it was temporarily disabled for client-side i18n implementation.
- Updated `next`, `next-intl`, and `fumadocs` packages to their latest versions.
- Cleaned up the `next.config.ts` by removing the eslint configuration.
- Enhanced `tsconfig.json` with additional paths for `fumadocs-mdx`.
- Adjusted imports in `layout.tsx` and `request.ts` for better structure and functionality.