GitLab

* Chore: Typo fixed in multiple files of docs/source/en/model_doc

* Update docs/source/en/model_doc/nllb-moe.md
Co-authored-by: Aryan V S <avs050602@gmail.com>

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Co-authored-by: Aryan V S <avs050602@gmail.com>

* Rename index.mdx to index.md

* With saved modifs

* Address review comment

* Treat all files

* .mdx -> .md

* Remove special char

* Update utils/tests_fetcher.py
Co-authored-by: Lysandre Debut <lysandre.debut@reseau.eseo.fr>

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Co-authored-by: Lysandre Debut <lysandre.debut@reseau.eseo.fr>

* Update flan-ul2.mdx

* Update flan-ul2.mdx

* add doc and readme

* add model docs

* update toctree and fix copies

* update

* update doc file

* fix

* add FLAN-UL2 to configuration mapping

* fixup

* Apply suggestions from code review

* more clarification

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Co-authored-by: younesbelakda <younesbelkada@gmail.com>
Co-authored-by: Younes Belkada <49240599+younesbelkada@users.noreply.github.com>