feat: Implement Staff Profile feature with BLoC architecture

- Added ProfileRepositoryInterface for staff profile operations.
- Created StaffProfileUI to represent extended profile information for the UI.
- Developed GetProfileUseCase to fetch staff profiles and map to UI entities.
- Implemented SignOutUseCase for user sign-out functionality.
- Introduced ProfileCubit to manage profile state and loading logic.
- Created ProfileState to represent various states of the profile feature.
- Developed ProfileNavigator for type-safe navigation within the profile feature.
- Built StaffProfilePage to display staff member's profile and statistics.
- Added various widgets for profile display, including reliability stats and menu items.
- Established StaffProfileModule for dependency injection and routing.
- Configured pubspec.yaml for feature package dependencies.

apps/mobile/packages/data_connect/lib/krow_data_connect.dart

@@ -9,6 +9,7 @@ library;
 
 export 'src/mocks/auth_repository_mock.dart';
 export 'src/mocks/staff_repository_mock.dart';
+export 'src/mocks/profile_repository_mock.dart';
 export 'src/mocks/event_repository_mock.dart';
 export 'src/mocks/skill_repository_mock.dart';
 export 'src/mocks/financial_repository_mock.dart';

apps/mobile/packages/data_connect/lib/src/mocks/profile_repository_mock.dart

@@ -0,0 +1,45 @@
+import 'package:krow_domain/krow_domain.dart';
+
+/// Mock implementation of profile-related data operations.
+///
+/// This mock provides hardcoded staff profile data for development and testing.
+/// It simulates the behavior of a real backend service without requiring
+/// actual API calls or Firebase Data Connect.
+///
+/// In production, this will be replaced with a real implementation that
+/// interacts with Firebase Data Connect.
+class ProfileRepositoryMock {
+  /// Fetches the staff profile for the given user ID.
+  ///
+  /// Returns a [Staff] entity with mock data.
+  /// Simulates a network delay to mirror real API behavior.
+  ///
+  /// Throws an exception if the profile cannot be retrieved.
+  Future<Staff> getStaffProfile(String userId) async {
+    // Simulate network delay
+    await Future.delayed(const Duration(milliseconds: 500));
+
+    // Return mock staff profile data
+    return const Staff(
+      id: '93673c8f-91aa-405d-8647-f1aac29cc19b',
+      authProviderId: 't8P3fYh4y1cPoZbbVPXUhfQCsDo3',
+      name: 'Krower',
+      email: 'worker@krow.com',
+      phone: '555-123-4567',
+      status: StaffStatus.active,
+      avatar: null,
+      livePhoto: null,
+      address: null,
+    );
+  }
+
+  /// Signs out the current user.
+  ///
+  /// Simulates the sign-out process with a delay.
+  /// In a real implementation, this would clear session tokens,
+  /// update Firebase auth state, etc.
+  Future<void> signOut() async {
+    // Simulate processing delay
+    await Future.delayed(const Duration(milliseconds: 300));
+  }
+}