Make build for linux (for VRCFaceTracking.Avalonia)

Since it seems like VRCFT comes to linux in some form, it would be nice to provide linux binaries too.
It's very possible to build it for linux

GUI for linux: https://github.com/dfgHiatus/VRCFaceTracking.Avalonia
Build script: https://gist.github.com/dfgHiatus/7b3d87100536db3a74914517d770cc7b

Created issue so it can be at least tracked and not forgotten