XCX DE wimdo export

[ScanMountGoat]

The XCX DE model format use a mix of modern and legacy Wii U data. Texture export is already supported by xc3_tex. Some additional features may need to be added in stages based on how difficult it is to recreate existing in game model data.

• vertex data
• skinning
• textures
• meshes
• materials

[ScanMountGoat]

This is working on the latest commit but still has issues for some models due to not correctly rebuilding materials and alternate textures.