feat: implement packaging unit and item management APIs

- Added CRUD operations for packaging units and their associated items in the new `packagingController.ts`.
- Implemented routes for managing packaging units and items in `packagingRoutes.ts`.
- Enhanced error handling and logging for better traceability.
- Ensured company code filtering for data access based on user roles.

Made-with: Cursor

frontend/lib/registry/components/v2-split-panel-layout/SplitPanelLayoutComponent.tsx

@@ -5103,6 +5103,7 @@ export const SplitPanelLayoutComponent: React.FC<SplitPanelLayoutComponentProps>
           }}
         />
       )}
+
     </div>
   );
 };