Wayland can't access window positions. From what I can tell this is an intentional limitation and there aren't ways to access this information.
This means functions such as `WM_window_find_under_cursor` doesn't work.
From the user perspective the following functionality wont work.
- "Swap Areas" / `SCREEN_OT_area_swap` isn't able to swap areas with another window.
- Some "Eyedropper" functions such as `datadropper_win_area_find` wont be able to access other windows.
- Dragging items between windows doesn't work (see `wm_event_cursor_other_windows`).
Currently `GHOST_SupportsWindowPosition()` has been added to prevent other windows being found when they shouldn't be.