Sorted Ocean Planet Classes

Planet classes are used with the planet_class command to change the plant class (for example, from desert to ocean or tropical to tundra). There are three types of planet classes: the planet biome (e.g. arid, continental, hive, etc.), the planet type (e.g. asteroid, broken, frozen, etc.), and the star class (e.g. black hole, neutron star, pulsar, etc.).