GitLab

* Init work on pipelines doc

* Work in progress

* Work in progress

* Doc pipelines

* Rm unwanted default

* Apply suggestions from code review

Lysandre comments
Co-authored-by: Lysandre Debut <lysandre@huggingface.co>
Co-authored-by: Lysandre Debut <lysandre@huggingface.co>

* Start doc tokenizers

* Tokenizer documentation

* Start doc tokenizers

* Tokenizer documentation

* Formatting after rebase

* Formatting after merge

* Update docs/source/main_classes/tokenizer.rst
Co-authored-by: Lysandre Debut <lysandre@huggingface.co>

* Address comment

* Update src/transformers/tokenization_utils_base.py
Co-authored-by: Thomas Wolf <thomwolf@users.noreply.github.com>

* Address Thom's comments
Co-authored-by: Lysandre Debut <lysandre@huggingface.co>
Co-authored-by: Thomas Wolf <thomwolf@users.noreply.github.com>

* Document TF modeling utils

* Document all model utils