Tailwind CSS 4 Migration (#100)

* Updated to TailwindCSS v4
* Moved CSS module to its own CSS file because of lightingcss strict validation
* Respect next parameter in middleware
* Updated all packages. 
* Split CSSs for better organization.
* Redesigned theme and auth pages
* Improved pill and header design
* Formatted files using Prettier
* Better footer layout
* Better auth layout
* Bump version of the repository to 2.0.0

apps/web/package.json

@@ -91,7 +91,8 @@
     "prettier": "^3.4.2",
     "require-in-the-middle": "7.5.0",
     "supabase": "^2.9.6",
-    "tailwindcss": "3.4.17",
+    "tailwindcss": "4.0.0",
+    "tailwindcss-animate": "^1.0.7",
     "typescript": "^5.7.3"
   },
   "eslintConfig": {