feat: Add initial Next.js root layout with global providers and comprehensive metadata.

src/app/layout.tsx

@@ -60,7 +60,7 @@ export const metadata: Metadata = {
     shortcut: '/favicon.ico',
   },
   verification: {
-    google: 'verification_code_placeholder', // User needs to replace this
+    google: 'C7cNjxkyxXcQHExRsdhIGjZ658BcK9ftuIpJK8NYRGc',
   },
 };