GitLab

* add documentation for DeepCache

* fix typo

* add wandb url for DeepCache

* fix some typos

* add item in _toctree.yml

* update formats for arguments

* Update deepcache.md

* Update docs/source/en/optimization/deepcache.md
Co-authored-by: Sayak Paul <spsayakpaul@gmail.com>

* add StableDiffusionXLPipeline in doc

* Separate SDPipeline and SDXLPipeline

* Add the paper link of ablation experiments for hyper-parameters

* Apply suggestions from code review
Co-authored-by: Steven Liu <59462357+stevhliu@users.noreply.github.com>

---------
Co-authored-by: Sayak Paul <spsayakpaul@gmail.com>
Co-authored-by: Steven Liu <59462357+stevhliu@users.noreply.github.com>