[FEAT] keybinding for fake players

[dthv]

Sometimes, DMs will want to quickly switch between DM's sight and faked players' sight. Yet, doing so requires lots of clicks.

Thus, I propose to introduce a keybinding for the fake player functionality and suggest F (for fake player) or Shift + F. I'd suggest to combine it with shift as some kind of a warning, but maybe that is not necessary. An alternative keybinding would be s for sight or v for vision.

An alternative would be to have a more prominent fake player button in the settings bar and not in the DM's settings modal.