P0-B1: Part 1064: RingWorlds

I have been looking into the possibility of adding RingWorlds to the project.

The SpaceExplorationEngine, which I am using for the generation of planets, the floating origin system, etc, does support RingWorlds, but I have up until now assumed that I would not be using them, so adding them in would require extensive changes to my custom code.

I have done some preliminary experiments into this however, and it seems like the work involved may not be as much as I first thought.