Add Sleep/Suspension Mode

[andrigamerita]

It would be nice to be able to suspend the system at any moment, while running any application, in a way that turns the screen off, lowers the CPU clock, and doesn't accept any input except for the key/combination used to wake up the console (something like modern smartphones do, or even the PSP or the DS which freeze the CPU entirely).

This would be ideal, as it would make the miyoo consoles even more pick-up-and-play. You could put them in this mode when you are playing them if you only want to stop for a few minutes and don't want to save the game, exit, and turn everything off. You could already just pause the game and lower the screen brightness to 0, in my experience that already is very power-efficient, but you could still input accidental presses if you put the console in your pocket or bag (for consoles like the Bittboy or PocketGo, Powkiddy V90 owners are lucky).

Alternatively, if this is for any reason not possible, maybe an hybrid shutdown feature could instead be introduced? Something like the one on the Funkey-S (of course triggered by a key combination for shutdown, since miyoo consoles don't have a hinge with a magnetic switch)

[VariantXYZ]

Just to piggy-back on this issue, in an older version of this CFW (I think 1.3.3), my PocketGo was able to suspend and wake at any moment by pressing the suspend button at the top.

As of the current version (Version 2.0.0 Beta 2 (Pre-Release)), this doesn't seem to work outside of the main menu.