runner is a desktop-only gadget which allows the running of commands
inside a nested wayland compositor inside a gadget using hw accel where
available
it should be possible to use this for things like:
* playing a movie on the desktop
* tailing a log in a terminal
* keeping an always-open terminal on your desktop
* using an external filemanager on the desktop
known issues:
- do not attempt to move the gadget once placed or bad things will happen
- some focus issues with gadget config
ca2e4eb738