[Feature Request] Make the unlimited soil + free soil movement costs toggleable

[Novocastrian]

Hello!

I've been using your mod for a while, and I like it! The landscaping brush tools are what I use most and save a lot of time in my builds.

I make this request as this would enrich the game from a roleplay perspective & be a middle ground between vanilla and completely free (cost-wise) landscape manipulation.

I will investigate if you are open to other people's PRs. If you permit, I'm a web dev by trade and would like to take a crack at this!