Parametrize carpets in basement nests

[Milopetilo]

Summary

Content "Basement nest carpets have variation"

Purpose of change

I thought nests always having the same color of carpet becomes a bit bland over time, so made it so carpets can have different colors. If more carpets ever get added it will also be easier to add them.

Describe the solution

Added a new palette standard_domestic_carpet_palette and apply where relevant. I tried to avoid changing out areas where the carpet was chosen for aesthetic reasons, or at least seemed like it was.

Describe alternatives you've considered

Not do this and always have the same carpets

Testing

Game loads, carpets change, furniture has correct flooring, carpets which shouldn't change don't.

Additional context

I had a lot of trouble with the parameter here because it only seems to work with "scope": "nest", I'm unsure if I did something wrong or this is intended.
I'm also planning on looking over most of the other nests and maybe buildings in general, but in order to keep the size of the pr down I thought I'd get this one out first.
Draft for now since #77208 needs to merge first

[Maleclypse]

Thank you for doing this. Parametrizing stuff makes a huge difference in how the game looks and feels.