feat: optimize website performance based on Lighthouse audit

- Eliminate render-blocking CSS by inlining Google Fonts and site stylesheets
- Reduce Cumulative Layout Shift (CLS) by preloading primary font variants
- Defer hydration of Search Dialog using client:idle to improve initial load
- Prioritize PNG favicon over large ICO file
- Move font definitions to src/styles/fonts.css for better maintainability

Co-authored-by: rockoder <2136164+rockoder@users.noreply.github.com>

Author: google-labs-jules[bot]

package.json

@@ -23,7 +23,6 @@
   "devDependencies": {
     "@types/react": "^19.0.0",
     "@types/react-dom": "^19.0.0",
-    "lighthouse": "^13.0.1",
     "typescript": "^5.8.3"
   }
 }