feat: new detachable panel UI (#81483)
This PR updates the devtool overlay to use a new detachable panel based
system for rendering content. Each panel can be configured to:
- drag
- resize
- close on click outside
- have min/max sizes if resizable, size if fixed
https://github.com/user-attachments/assets/982ecee3-5ef0-424e-8fcc-4c54dfadcb25
