Changes:
- #15967: Material: Fix disposing resources when disposing of a material
- #15968: Keep splats datas in ram
- #15965: Fix camera serialization
- #15964: Fix an issue with effect reference counting
- #15897: Physics Character Controller
- #15957: Update launch to match the repo
- #15959: Add IES to inspector
- #15958: doc fix: links in readme of loader package
- #15952: IES shader
- #15956: Graph tools tests