perf: add sharp for image optimization, lazy loading on menu

- Added sharp for server-side image resizing
- Lazy loading and async decoding on menu images
- Added thumbnail column to images table
- Images API now generates 400x300 thumbnails on upload

package.json

@@ -16,7 +16,8 @@
     "next": "14.2.28",
     "pg": "^8.12.0",
     "react": "^18.3.1",
-    "react-dom": "^18.3.1"
+    "react-dom": "^18.3.1",
+    "sharp": "^0.35.2"
   },
   "devDependencies": {
     "@testing-library/jest-dom": "^6.9.1",