feat(pc-keyboard): Octave shift on z/x press & layout independent key handling

[PolyMeilex]

• z x Can now shift PcKeyboard octave
• The octave shift is saved in the config
• While at it the key handling was changed to be keyboard layout independent

[kasimeka]

this makes a lot more sense in the context of the repo and i feel like an idiot for my PR😅
and yes it works great with my dvorak layout

[kasimeka]

can i get my nix flake merged tho? would love to run the app with nix run github:PolyMeilex/Neothesia instead of cloning the repo / downloading a release

[kasimeka]

any intention to implement the guess an octave shift near the center of the piano range logic tho?

[PolyMeilex]

i feel like an idiot for my PR

No problem, it still makes the implementation easier for me when I have a POC to go of off.

can i get my nix flake merged tho?

Sure, that might be useful for other people too.

any intention to implement the guess an octave shift near the center of the piano range logic tho?

Yeah, I just wonder how to do that best in the context of me adding the "remember last setting" logic. Perhaps the remember logic is not that usefull tho.

[kasimeka]

in the context of me adding the "remember last setting" logic

i think overwriting the saved octave shift with the calculated value only after piano range settings are changed, and otherwise keeping the saved value intact would be reasonable

[PolyMeilex]

i think overwriting the saved octave shift with the calculated value only after piano range settings are changed, and otherwise keeping the saved value intact would be reasonable

Sounds good. I will recalculate it on every range change.