feat: Add placeholder for unimplemented features in Get Started, Home, and Profile modules

feat: Add placeholder for Rapid Order success view and comment out Rapid action card

apps/mobile/packages/features/staff/authentication/lib/src/presentation/pages/get_started_page.dart

@@ -16,8 +16,14 @@ class GetStartedPage extends StatelessWidget {
   const GetStartedPage({super.key});
 
   /// On sign up pressed callback.
-  void onSignUpPressed() {
-    Modular.to.pushPhoneVerification(AuthMode.signup);
+  void onSignUpPressed(BuildContext context) {
+    /// TODO: FEATURE_NOT_YET_IMPLEMENTED
+    /// Replace with actual sign up flow when implemented
+   ScaffoldMessenger.of(context).showSnackBar(
+      const SnackBar(
+        content: Text('Sign Up feature not yet implemented.'),
+      ),
+    );
   }
 
   /// On login pressed callback.
@@ -48,7 +54,7 @@ class GetStartedPage extends StatelessWidget {
 
                   // Actions
                   GetStartedActions(
-                    onSignUpPressed: onSignUpPressed,
+                    onSignUpPressed: () => onSignUpPressed(context),
                     onLoginPressed: onLoginPressed,
                   ),