Convert physical_key UI bindings to logical_key

[lukexor]

Winit docs outline the differences pretty well: https://docs.rs/winit/latest/winit/event/struct.KeyEvent.html#structfield.physical_key

TetaNES allows fully customizing all keybindings, but it may be confusing to users with custom keyboard layouts to lookup the controls in the README, only to discover that the default key bindings don't match their layout.

Normally for games, physical_key can be useful like WASD for movement so the best path forward may be to support both and rely on physical_key for the default keyboard bindings for Player 1, and logical_key for all other bindings.