TF-3605 E2E Mailbox create, rename, move and delete sub folder

integration_test/scenarios/mailbox/create_personal_folder_scenario.dart

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+import 'package:flutter_test/flutter_test.dart';
+
+import '../../base/base_test_scenario.dart';
+import '../../robots/mailbox_menu_robot.dart';
+import '../../robots/thread_robot.dart';
+
+class CreatePersonalFolderScenario extends BaseTestScenario {
+  const CreatePersonalFolderScenario(super.$);
+
+  @override
+  Future<void> runTestLogic() async {
+    const folderName = 'crud personal folder';
+
+    final threadRobot = ThreadRobot($);
+    final mailboxMenuRobot = MailboxMenuRobot($);
+
+    await threadRobot.openMailbox();
+    await mailboxMenuRobot.tapAddNewFolderButton();
+    await mailboxMenuRobot.enterNewFolderName(folderName);
+    await mailboxMenuRobot.confirmCreateNewFolder();
+    await _expectMailboxWithNameVisible(folderName);
+  }
+
+  Future<void> _expectMailboxWithNameVisible(String name) async {
+    await expectViewVisible($(name));
+  }
+}