feature request: basic commands as buttons

[se6astian-pi]

Oscar: I was wondering if it's possible to have basic operating commands such as rebooting the camera, HDMI start/stop and shutdown in the webui?

[rroohhh]

Well with the current backend this is basically trivial, as we can just execute arbitrary shell commands as root :)

@BAndiT1983 might want to take a look?

[se6astian-pi]

Excellent :D

[BAndiT1983]

Can do. A bit dangerous to send plain shell commands, but maybe it can be wrapped later in nctrl, with a allow list of commands.