GitLab

* [SDXL, Docs] Textual inversion

* Update docs/source/en/using-diffusers/sdxl.md

* finish

* Apply suggestions from code review
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>

* add: utility for image grid.

* add: return type.

* change necessary places.

* add to utility page.

* add safetensors flag

* apply review

* why mdx?

* why mdx?

* why mdx?

* no x for kandinksy either

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Co-authored-by: Patrick von Platen <patrick.v.platen@gmail.com>

* add textual inversion inference to docs

* add to toctree

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Co-authored-by: Sayak Paul <spsayakpaul@gmail.com>