GitLab

* Link to the Datasets doc

* Remove unwanted file

* Reorganize doc for multilingual support

* Fix style

* Style

* Toc trees

* Adapt templates

* ✨ refactor code samples with framework-specific blocks

* ✨ update training.mdx

* 🖍 apply feedback

* 🖍 fix links in guides

* 🖍 apply feedback

* 📝 first draft of audio/vision guides

* ✨ make fixup

* 🖍 fix typo

* 🖍 close parentheses

* 🖍 apply feedback

* 🖍 apply feedback, make fixup

* 🖍 more fixup for perceiver

* 🖍 apply feedback

* ✨ make fixup

* 🖍 fix data collator