TextureSwapper 1.2V

• Added support for multiple texture swapping.
• Added functions to call the texture swapper system via code.
• GUI support.
• Documentation and user manuals.
• Fixed typos and inconsistencies in the code.
• Fixed some inconsistencies with SkeletonSO asset references.
• Included a necessary shader for the TextureSwapper to work with Unity.

TextureSwapper 1.0V

Stability Fixes in SkeletonSO

• Added a return argument if there aren't any TextureSO references in the menu.