[macOS] Set state to AFK when screen is locked or computer is asleep

[naturecodevoid]

I suggest that whenever loginwindow is the current window on macOS, the state be changed to AFK. loginwindow is what is shown when the computer is locked, which means the user is away from their computer. This can be observed with aw-watcher-window.

[naturecodevoid]

A better way to do this would be to check the CGSSessionScreenIsLocked key of the session info dictionary. See this StackOverflow answer for more info: https://stackoverflow.com/a/11511419

There is also a pure bash answer, if the Quartz library is not available (it wasn't when I tried): https://stackoverflow.com/a/66723000

This solution can also be easily packaged into a ~10 line C program, let me know if that would be useful.