Complete chapter Human structure (7.3.4)

[LudwigFriedmann]

Is your feature request related to a problem? Please describe.
(TBD) Currently, the chapter and its subchapters are lacking text and illustrations. Even though the human structure has slightly changed, https://github.com/asam-ev/OpenMATERIAL/blob/OpenMATERIAL_Legacy/model_structure/Pedestrian_Structure.md and the Miro board can serve as sources of information.

Describe the solution you'd like
Text and illustrations are added to the chapter.

Describe alternatives you've considered

Additional context

[ClemensLinnhoff]

We might need to change the structure a bit. The mesh(es) that are moved by the armature need to be part of the armature hierarchy.
So we need something like

• Root

  • Armature
    • Skeleton
      • Root_Bone
        • Hip
        • ...
    • Body
    • Hair
    • Clothing
  • Accessory

  I will upload an example model shortly on this branch: https://github.com/asam-ev/OpenMATERIAL/tree/157-provide-example-for-a-human-asset-analog-to-vehicle-example

[ClemensLinnhoff]

I added the example, see PR #158