♻️ Refactor the app management to use sheet

lib/screens/developers/new_app.dart

@@ -4,10 +4,20 @@ import 'package:island/screens/developers/edit_app.dart';
 class NewCustomAppScreen extends StatelessWidget {
   final String publisherName;
   final String projectId;
-  const NewCustomAppScreen({super.key, required this.publisherName, required this.projectId});
+  final bool isModal;
+  const NewCustomAppScreen({
+    super.key,
+    required this.publisherName,
+    required this.projectId,
+    this.isModal = false,
+  });
 
   @override
   Widget build(BuildContext context) {
-    return EditAppScreen(publisherName: publisherName, projectId: projectId);
+    return EditAppScreen(
+      publisherName: publisherName,
+      projectId: projectId,
+      isModal: isModal,
+    );
   }
 }