Catch unsupported transforms on armature

[marian-m12l]

Adds a check in the glTF parser to throw an error if any ancestor of a skin's root bones has transforms that would be lost in Tiny3D

[marian-m12l]

As discussed, I threw in an epsilon comparison to avoid potential false-positives on very small transforms. I didn't notice any visual issues with the mesh / animations when adding tiny transforms to the armature that fall under the threshold.

[marian-m12l]

As mentioned on discord, I also think the armature transforms could be supported by tweaking the importer tool.