[Feature] attributes assigned to corresponding mesh

[McLightningJo]

Is your feature request related to a problem? Please describe.

I use attributes for stuff like automatically merging lods or replicating game behavior. This only became a minor issue for me after the new naming system, as I used the prior system's inclusion of the "atr_" found at the end of the mesh name, like "...shpk;atr_lod;atr_ude", to distinguish which mesh uses what attributes. I tried updating my script to use modelAttributes data property, but that gives EVERY attribute found on the whole model, not separated.

Describe the solution you'd like

I believe within CharacterComposer.cs, a new property similar to how meshShapes is found can be used, but for meshAttributes. Where each mesh part gets their appropriate attribute(s), just like the shapekeys.

Additional context