Make skin and bone compatible with attach

### The feature, motivation and pitch

`deformable/skin/bone` uses `body` field to set `Name of the body corresponding to this bone.`, but when attaching a skinned body hierarchy to a parent model, the attach prefix changes the body names, while the skin still looks for the original names, resulting in `unknown body xxx in skin`. It could be improved to have a more coherent attach API.

### Alternatives

_No response_

### Additional context

_No response_