Omarchy 3.7.0

Add streamlined Steam installer that doesn't need user input; add fully preconfigured RetroArch that no longer depends on AUR; add streamlined Bluetooth Xbox controller compatibility without needing to restart; add Lutris Launcher to Install, Gaming for running Battle.net games (Diablo, Starcraft, WoW); add Heroic Launcher to Install, Gaming for running Epic Games (sadly no Fortnite or Rocket League); add Moonlight GameStream client to Install, Gaming for remote play of PC games from Sunshine server; add Xbox Cloud Gaming web app to Install, Gaming for remote Xbox Game Pass play; add Install, Gaming, Remove for removing any of the game setups; fix obstructive SDL_VIDEODRIVER env causing problems with many Steam games.