Notes:
* In general, keybindings are similar to the existing i3 configuration for
the Nokia N900
* Power key and lock switch enable/disable the screen
* The keypad is always lit (dimly) when the screen/touch are active and is
turned off at other times
* The font can be increased/decreased in foot with Ctrl+Up/Down arrow
* The status uses the configuration and feed generator from i3 (i3blocks)
* After two minutes of idle, the screen and touch sensor will be disabled
Part-of: https://gitlab.postmarketos.org/postmarketOS/pmaports/-/merge_requests/6714
[ci:skip-build]: already built successfully in CI