How do I incorperate mods into Galaxy Forge?

Hi,

Basically, I want to create a galaxy forge map
with the distant stars planet types. I know this is possible,
but how do I do it? Also, is it possible to have premade fleets for players?
Please help.

I didn't find the right solution from the Internet.

References:
forums.dfgfx.com/399314/how-do-i-incorperate-mods-into-galaxy-forge
Startup Explainer Video


Thanks