feat: implement Supabase authentication with Google OAuth

Add Supabase client, middleware, and auth pages; update header for auth state.

Co-authored-by: ASOwnerYT <[email protected]>

package.json

@@ -10,7 +10,6 @@
   },
   "dependencies": {
     "@hookform/resolvers": "^3.9.1",
-    "@vercel/analytics": "1.6.1",
     "@radix-ui/react-accordion": "1.2.12",
     "@radix-ui/react-alert-dialog": "1.1.15",
     "@radix-ui/react-aspect-ratio": "1.1.8",
@@ -38,6 +37,9 @@
     "@radix-ui/react-toggle": "1.1.10",
     "@radix-ui/react-toggle-group": "1.1.11",
     "@radix-ui/react-tooltip": "1.2.8",
+    "@supabase/ssr": "^0.9.0",
+    "@supabase/supabase-js": "^2.99.3",
+    "@vercel/analytics": "1.6.1",
     "autoprefixer": "^10.4.20",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",