Add grouping capability to Known Entity for comp_entity_finder

It's a bit inconvenient to create them in different categories each time for the same action. I think it would be nice to add grouping for Known Entities.


<img width="986" height="772" alt="Image" src="https://github.com/user-attachments/assets/f42fecd2-1497-4619-8ae1-206132c22475" />