feat: implement admin API for user and representation management

- Updated UsersPage to fetch users from the new admin endpoint.
- Enhanced user data structure to include 'name' and modified rendering logic.
- Added RepresentationDetailPage for detailed representation management.
- Created AdminApiController to handle user and representation CRUD operations.
- Implemented pagination and search functionality for users and representations.
- Updated user and representation data models to reflect new API structure.

assets/admin/lib/api.ts

@@ -66,11 +66,11 @@ export interface ApiResponse<T> {
 
 export interface PaginatedResponse<T> {
   success: boolean;
-  data: {
-    items: T[];
-    total: number;
-    page: number;
-    limit: number;
+  data: T[];
+  meta: {
+    totalRecords: number;
+    totalPages: number;
+    currentPage: number;
   };
   errors: [];
 }