[n64] Add hotkey to switch between controller (memory) pak and rumble pak

[Zoomer1988]

Is your feature request related to a problem? Please describe.
Some N64 games save directly to a game cartridge, however lots of N64 games save to a controller (memory) pak that is inserted into the game controller. These games often require you to switch memory and rumble paks midgame. Currently, then, you have to exit full screen mode to access the GUI and there switch those manually.

Describe the solution you'd like
It would've been great if Ares had a hotkey to switch between rumble and controller paks on the fly without exiting the full screen mode.

Describe alternatives you've considered
Using GUI. However, it's not very convenient since you have to use keyboard/mouse instead of controller. You also have to exit the full screen mode.

Additional context
This issue was already mentioned in #1197 and my idea is an extension of that. :)