[Feature Request]: Add ability to ignore some properties in the planet definition

[Kevadroz]

Is your feature request related to a problem?

It's annoying not being able to modify a dimension's gravity, temperature, etc. without adding it to the planet selection screen or adding an orbit dimension to it.

Solution(s)

Make the properties "orbit" and "solar_system" optional, so when those aren't specified the "planet" just won't have an orbit associated to it, making it not possible to create space stations on it and hiding it from the planet selection screen respectively.

Describe alternatives you've considered

Either make most properties optional with default values or add an extra two boolean properties to invalidate the orbit and solar system properties.

Mod Version

1.15.19

Mod Loader Version

1.20.1 - 47.3.12

Mod Loader

Forge

Additional context

I'm trying to set the oxygen, temperature, etc. of the nether and the end. And I'm also making an asteroid belt, for wich it makes no sense to have an orbit.