gpio buttons

original Tamagotchi had buttons to interact, I'd like to be able to interact more and add features.

using gpio for buttons to run scripts -
shutdown
sleep (low power eg screen off but still working or slow refresh)
run a specific attack like pixie dust.
proximity sensor screen off
view currently stored messages on screen

No file, test, or entry point is identified in the issue. First clarify which GPIO interaction should be implemented and its expected behavior; done would be a defined button or sensor feature that supports the agreed actions and can be verified on the target hardware.

Written by the indexing model from the issue text.