Global Wind

A Beta version of 2.0, with a partial implementation of the new physics system. The wind calculation has been mostly separated into its own embedded library. Also adds more config options. Old config options are no longer used; use new ones.

Also fixes Simple Clouds incompatibility, I think.

You don't have to update to this version other than for mod compatibility reasons. This version is beta and thus not as polished (but may be more stable).

Only 1.20.1 for now.