refactor: unify agent marketplace to single endpoint with cursor pagination

- Replace multiple marketplace routes with unified /marketplace endpoint
  - Add query string controls: category, search, limit, cursor, promoted, requiredPermission
  - Implement cursor-based pagination replacing page-based system
  - Integrate ACL permissions for proper access control
  - Fix ObjectId constructor error in Agent model
  - Update React components to use unified useGetMarketplaceAgentsQuery hook
  - Enhance type safety and remove deprecated useDynamicAgentQuery
  - Update tests for new marketplace architecture
  -Known issues:
  see more button after category switching + Unit tests

api/models/Agent.js

@@ -486,7 +486,7 @@ const getListAgentsByAccess = async ({
       const cursorCondition = {
         $or: [
           { updatedAt: { $lt: new Date(updatedAt) } },
-          { updatedAt: new Date(updatedAt), _id: { $gt: mongoose.Types.ObjectId(_id) } },
+          { updatedAt: new Date(updatedAt), _id: { $gt: new mongoose.Types.ObjectId(_id) } },
         ],
       };
 
@@ -514,6 +514,9 @@ const getListAgentsByAccess = async ({
     projectIds: 1,
     description: 1,
     updatedAt: 1,
+    category: 1,
+    support_contact: 1,
+    is_promoted: 1,
   }).sort({ updatedAt: -1, _id: 1 });
 
   // Only apply limit if pagination is requested