Shape Shifter Curse-Unofficial Port

First 1.21.11 Test Build

Known Issues:

1. Missing textures on the SSCU advancement screen
2. CurseMoon’s purple global lighting effect during nighttime lacks noticeable change
3. The modify_type_tag tag is non-functional
4. Fur gradient shader does not work
5. Cape X rotation clamping is broken
6. TransformFX no longer uses Satin; the new implementation looks slightly different compared to the original mod