This is consistent with `xatlas_unwrap`, which isn't enabled in non-editor
builds and the Android editor either. There is currently no way to
use the lightmapper in a non-editor build anyway, as it doesn't expose
any methods (and even if there was, there would be no way to perform
UV2 unwrapping in the exported project).
This reduces binary size of a stripped Linux x86_64 export template
build by ~164 KB.
This also moves the PrimitiveMesh texel size project setting
so that it's defined when the module is disabled,
and adds a property hint to it.
-Added LocalVector (needed it)
-Added stb_rect_pack (It's pretty cool, we could probably use it for other stuff too)
-Fixes and changes all around the place
-Added library for 128 bits fixed point (required for Delaunay3D)
