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* Fix typos, update, add Copyright info, and trim trailing whitespace

* Update alt_diffusion.md

* Remove nonoperational demo

* Update docs/source/en/api/pipelines/consistency_models.md
Co-authored-by: Steven Liu <59462357+stevhliu@users.noreply.github.com>

* Update docs/source/en/api/pipelines/latent_consistency_models.md
Co-authored-by: Steven Liu <59462357+stevhliu@users.noreply.github.com>

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