Additional directives that would make development easier

The following directives would have been helpful when working on `huggingface_hub`:

- A directive to specify in which version it was added (equivalent of [versionadded](https://www.sphinx-doc.org/en/master/usage/restructuredtext/directives.html#directive-versionadded))
- A directive to specify in which version it was changed (equivalent of [versionchanged](https://www.sphinx-doc.org/en/master/usage/restructuredtext/directives.html#directive-versionchanged))
- A directive to specify it is deprecated (equivalent of [deprecated](https://www.sphinx-doc.org/en/master/usage/restructuredtext/directives.html#directive-deprecated))