[Feature Request] Layout window grouping

Hi! I love using the extension, but I think it could use a cool new feature: grouping windows by layout.

For example:
I have a two-pane layout `[ ][ ]`.
I have three windows:
- Two are assigned to the left and right panes of the layout.
- The third is a fullscreen window that covers both panes.

When I switch to one of the layout windows, the other windows in that layout should pop up on top of the fullscreen window, covering it.
'Windows grouped by layout' could also appear 'together' in gnome 'window overview' (activated `super` key)

Thanks! 😊