Controller Support Update

I decided one day while sitting on my couch streaming steam games to my TV that Sanguinite would be an awesome couch game. This update focuses on adding full controller support to the game; all gameplay and UI navigation should be functional with a controller now.

I think flying drones with analog input feels great and is the superior way to play the game. There are still some rough spots in the UI that need to be addressed-- any and all feedback is welcome!

This is also a great step towards Steamdeck compatibility and (very long-term far future) possible porting to other systems.

I've only tested using an XBox controller, but the game theoretically should be compatible with any controller. There's no button mapping yet, although that's definitely a future goal (for keyboard + mouse as well).

Along with controller support, "rover" type enemies that previously and mysteriously were able to drive around sideways on cavern walls have been converted to proper upright rovers that drive on the cavern floor.

Good luck, Envoys!