GitLab

* feat: sdxl model support

* code style auto-modified by pre-commit hook

* refine comments

* add tests and examples for sdxl

* refine sdxl tests code

* make linter happy

* mv the locations of the examples

* move the locations of the tests

* refine tests and examples

* add API documentation for unet_sdxl.py

* usage doc for sdxl

* update docs

* update

* refine pipeline initialization

* refine tests for sdxl/sdxl-turbo