Symmetrize Armature now also symmetrizes the transform of custom bone
shapes.
Adds a new property to `bpy.ops.armature.symmetrize`:
//Parameters//:
- **direction **(enum in ['NEGATIVE_X', 'POSITIVE_X'], (optional)) –
**Direction**, Which sides to copy from and to (when both are selected)
- **custom_shape **(enum in ['SYMMETRIZE_SAME', 'SYMMETRIZE_ALL',
'SYMMETRIZE_NONE'], (optional)) – **Custom Shapes**, Wether to
symmetrize non symmetric custom bone shapes, all custom shapes, or
none at all
//Rationale//:
Reviewed By: #animation_rigging, Mets, sybren
Maniphest Tasks: T91871
Differential Revision: https://developer.blender.org/D13416
452a7f6731