Docs, any preference?

[koaning]

@ritchie46 Do we have any preference for documentation? I could go for something like mkdocs but I figured checking in first because it wouldn't fit the current documentation style.

[ritchie46]

Yeah, I've tried a lot. Eventually I concluded that sphinx is most versatile, but requires some setting up. We could simply copy paste that from the main polars repo. Then the setup is done. :)

Once consistent code style and documentation practice keeps mental overhead lower.