Add autosave feature

[CrystalSplitter]

Once a day, on start up, save the current full state to the userData directory as ffr_autosave.frdata.

This addresses
#228 somewhat, though it would be nice to surface this info more easily.

[CrystalSplitter]

This needs MacOS and windows testing.

[nubesurrealista]

Do you need some testing on Linux? owo

[CrystalSplitter]

More testing always helps. Do you know what to look for? It's in the userData folder of your system, which I think for most linuxes should be ~/.config/<NAME OF APP>/. The name during testing can vary quite a bit, so maybe search for the file name ffr_autosave.frdata.

[nubesurrealista]

More testing always helps. Do you know what to look for? It's in the userData folder of your system, which I think for most linuxes should be ~/.config/<NAME OF APP>/. The name during testing can vary quite a bit, so maybe search for the file name ffr_autosave.frdata.

It works! it seems, I mean, the file is there

[CrystalSplitter]

I think I want to move this file somewhere else if I can, because it being at the top level seems too risky.