HC Sanatorium devlog 03 (Patreon)

- Created sprites for player's cell/room.
- Created Player's cell level.
- Added switch mechanism for lights (on/off).
- Added door mechanism - travelling between levels.
- Some background code stuff and changes.
- Player can use doors and switch with button E.

Plans for future: add activities on the computer, inventory system, more interactivity, getting tied to the bed after being catched.