complete set of changes for RPi 5

[outdoorbits]

This is the complete change as I use it in https://github.com/outdoorbits/little-backup-box.

[RampantDespair]

@outdoorbits
Did you add the setup requirement for the build?
Because looking at the details, it's mainly No module named 'gpiozero' #271
I added it in #277, I could PR it to your fork instead of main if that's fine?

[outdoorbits]

You are welcome. I installed gpiozero by apt as mentioned at https://gpiozero.readthedocs.io/en/latest/installing.html

[RampantDespair]

@outdoorbits Yeah I understand that, but when the tests run, I suspect that the setup needs to be made aware of the necessary packages for it to function correctly. I opened a PR for your fork

[RampantDespair]

@rm-hull ...

[rm-hull]

Looks like some test failures need investigating