Armar3 wrl obj meshes

Adds .wrl models and .obj models for ARMAR-III and the MMM model. These are required by ArViz Godot.

Some ARMAR-3 files had to be edited manually due to inconsistent scaling:

• Set the top-most scaling from "0.001 0.001 0.001" to "1 1 1"
• Scale the top-most transform, e.g., from 7.5 to 0.0075

MMM model worked pretty well automatically.