Hair Colored Skin Gene

Adds a gene that makes pawn's skin the same color as their hair.

It doesn't change anything else, it's purely cosmetic.

I don't know about any other mod that does that, so made this one in few hours despite knowing very little about how modding rimword works, if there's a mod that does the same thing and is probably better please tell me about it so I know I didn't have to spend a few hours that I would waste anyway.