Add frontend subdirectory to project

frontend/test/user_message_tile_test.dart

@@ -0,0 +1,42 @@
+import 'package:auto_gpt_flutter_client/views/chat/user_message_tile.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  // Test group for UserMessageTile widget
+  group('UserMessageTile', () {
+    // Test to check if the widget renders without error
+    testWidgets('renders without error', (WidgetTester tester) async {
+      await tester.pumpWidget(const MaterialApp(
+        home: Scaffold(
+          body: UserMessageTile(message: 'Hello, User!'),
+        ),
+      ));
+      expect(find.byType(UserMessageTile), findsOneWidget);
+    });
+
+    // Test to check if the widget displays the correct user message
+    testWidgets('displays the correct user message',
+        (WidgetTester tester) async {
+      const testMessage = 'Test Message';
+      await tester.pumpWidget(const MaterialApp(
+        home: Scaffold(
+          body: UserMessageTile(message: testMessage),
+        ),
+      ));
+
+      expect(find.text(testMessage), findsOneWidget);
+    });
+
+    // Test to check if the widget displays the "User" title
+    testWidgets('displays the "User" title', (WidgetTester tester) async {
+      await tester.pumpWidget(const MaterialApp(
+        home: Scaffold(
+          body: UserMessageTile(message: 'Any Message'),
+        ),
+      ));
+
+      expect(find.text('User'), findsOneWidget);
+    });
+  });
+}