feat: Prepare App.tsx for workshop authentication flow

🔧 Workshop Configuration:
- Comment out Authenticator component for workshop setup
- Add placeholder signOut and user variables for workshop steps
- Maintain authentication structure for easy workshop activation
- Keep all routes and functionality intact

📝 Notes:
- Authenticator will be uncommented during workshop
- signOut and user variables will be replaced with actual auth
- This allows workshop participants to see the app without auth setup first

Author: yeonuk-lim

src/App.tsx

@@ -75,17 +75,17 @@ const WorkshopApp = ({ signOut, user = defaultUser }: WorkshopAppProps) => {
 
 export default function App() {
   // This parameter will be used in the workshop
-  // const signOut = undefined;
-  // const user = defaultUser;
+  const signOut = undefined;
+  const user = defaultUser;
 
   return (
-    <Authenticator>
-      {({ signOut, user }) => (
+    // <Authenticator>
+    //   {({ signOut, user }) => (
         <WorkshopApp
           signOut={signOut}
           user={user ? convertAuthToUserType(user) : defaultUser}
         />
-      )}
-    </Authenticator>
+    //   )}
+    // </Authenticator>
   );
 }