feat: add Flutter schema-driven form cards

mobile/lib/app/app.dart

@@ -0,0 +1,17 @@
+import 'package:aioa_mobile/app/router.dart';
+import 'package:aioa_mobile/app/theme.dart';
+import 'package:flutter/material.dart';
+
+class AioaApp extends StatelessWidget {
+  const AioaApp({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp.router(
+      title: 'AIOA',
+      debugShowCheckedModeBanner: false,
+      theme: buildAioaTheme(),
+      routerConfig: appRouter,
+    );
+  }
+}