GitLab

* Reorganize doc for multilingual support

* Fix style

* Style

* Toc trees

* Adapt templates

* Remove unused attributes

* Add link to blog and add clarification about input size

* Improve readability of the code
Co-authored-by: Niels Rogge <nielsrogge@Nielss-MacBook-Pro.local>

* [doc] consistent True/False/None default format

* Update src/transformers/models/xlnet/modeling_xlnet.py
Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>
Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>

* Convert all tutorials and guides

* Convert all remaining rst to mdx

* Track and fix bad links