9.0 Pre-Alpha 1.17 Support

This is a pre-alpha development build meant only for users who really need to be on the bleeding edge of 1.17

Use at your own Risk!

Back up all Magic Data First!
/plugins/Magic/data/
Maybe player data too, idk

I haven't even updated my own dev servers yet, nor can I get the build server to build this (requires Java 16) so for now I'm making a pre-release here, that I will likely delete later.