Make shuttle airlocks play sound effects when opened or closed
Created by: DamianX
Because it bothers me that those are completely silent.
The way I did it is copypasting the open() and close() code from the parent and placing a playsound() in the middle. It sounds wrong, so please do tell if it should be done some other way.
- rscadd: Shuttle airlocks now make sounds when they open and close