game-performance wrapper session inhibiting

[russjr08]

Not sure if this is something that would be in-scope for the game-performance wrapper, but it would be great if along with changing the active power profile, it would also inhibit screen-locking/sleep while a game is running - more or less for when using a controller with a game. This is something that I know Feral's GameMode does automatically, but I see its not recommended while using Cachy.

On Wayland based environments this is done through the session inhibit protocol, and both KDE and GNOME have their own wrappers to do this (kde-inhibit and gnome-session-inhibit respectively), but for a universal solution systemd-inhibit could be utilized (the --why= flag could be used in the same way the -r flag is used in powerprofilesctl).