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/server/controllers/agents/v1.js

@@ -389,16 +389,16 @@ const deleteAgentHandler = async (req, res) => {
 const getListAgentsHandler = async (req, res) => {
   try {
     const userId = req.user.id;
-
+    const requiredPermission = req.query.requiredPermission || PermissionBits.VIEW;
     // Get agent IDs the user has VIEW access to via ACL
     const accessibleIds = await findAccessibleResources({
       userId,
       resourceType: 'agent',
-      requiredPermissions: PermissionBits.VIEW,
+      requiredPermissions: requiredPermission,
     });
     const publiclyAccessibleIds = await findPubliclyAccessibleResources({
       resourceType: 'agent',
-      requiredPermissions: PermissionBits.VIEW,
+      requiredPermissions: requiredPermission,
     });
     // Use the new ACL-aware function
     const data = await getListAgentsByAccess({