feat: Update API endpoint usage in repositories to remove redundant path property

- Refactored multiple repository implementations across client and staff features to directly use endpoint objects without accessing the `path` property.
- Introduced a new `FeatureGate` class for client-side feature gating based on user scopes, allowing for better access control to API endpoints.
- Added `ApiEndpoint` class to represent API endpoints with their paths and required scopes for future feature gating.

apps/mobile/packages/features/staff/clock_in/lib/src/data/repositories_impl/clock_in_repository_impl.dart

@@ -17,7 +17,7 @@ class ClockInRepositoryImpl implements ClockInRepositoryInterface {
   @override
   Future<List<Shift>> getTodaysShifts() async {
     final ApiResponse response = await _apiService.get(
-      StaffEndpoints.clockInShiftsToday.path,
+      StaffEndpoints.clockInShiftsToday,
     );
     final List<dynamic> items = response.data['items'] as List<dynamic>;
     // TODO: Ask BE to add latitude, longitude, hourlyRate, and clientName
@@ -33,7 +33,7 @@ class ClockInRepositoryImpl implements ClockInRepositoryInterface {
   @override
   Future<AttendanceStatus> getAttendanceStatus() async {
     final ApiResponse response = await _apiService.get(
-      StaffEndpoints.clockInStatus.path,
+      StaffEndpoints.clockInStatus,
     );
     return AttendanceStatus.fromJson(response.data as Map<String, dynamic>);
   }
@@ -44,7 +44,7 @@ class ClockInRepositoryImpl implements ClockInRepositoryInterface {
     String? notes,
   }) async {
     await _apiService.post(
-      StaffEndpoints.clockIn.path,
+      StaffEndpoints.clockIn,
       data: <String, dynamic>{
         'shiftId': shiftId,
         'sourceType': 'GEO',
@@ -62,7 +62,7 @@ class ClockInRepositoryImpl implements ClockInRepositoryInterface {
     String? shiftId,
   }) async {
     await _apiService.post(
-      StaffEndpoints.clockOut.path,
+      StaffEndpoints.clockOut,
       data: <String, dynamic>{
         if (shiftId != null) 'shiftId': shiftId,
         'sourceType': 'GEO',