Add Google Maps integration and update UI components; change platform version and minimum SDK

lib/components/group/group_content.dart

@@ -6,8 +6,8 @@ class GroupContent extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return Scaffold(
-      appBar: AppBar(title: const Text('Group Page')),
-      body: const Center(child: Text('This is the Group Page')),
+      appBar: AppBar(title: const Text('Chat Group Page')),
+      body: const Center(child: Text('This is the Chat Group Page')),
     );
   }
 }