Jupiter + moons - Githubissues

Changes

I added Jupiter + moons. Didn't bother testing as the terrains are identical to venus and enceladus, and my laptop is reaching its limits

[ ] I have fully tested the proposed changes and promise that they will not break world generation, mob spawning, and the like.
[x] I followed the existing code standards and didn't mess up the formatting.
[x] I did my best to add documentation to any public classes or methods I added.
[ ] I have added Nonnull and Nullable annotations to my methods to indicate their behaviour for null values