Include license and readme for sphinxcontrib-jquery

docs/sphinx_exts/sphinxcontrib_jquery/LICENCE

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+BSD Zero Clause Licence
+
+Copyright 2022, Adam Turner
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+PERFORMANCE OF THIS SOFTWARE.

docs/sphinx_exts/sphinxcontrib_jquery/README.rst

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+======================
+ sphinxcontrib-jquery
+======================
+
+.. image:: https://img.shields.io/pypi/v/sphinxcontrib-jquery.svg
+   :target: https://pypi.org/project/sphinxcontrib-jquery/
+   :alt: Package on PyPI
+
+``sphinxcontrib-jquery`` ensures that jQuery is always installed for use in
+Sphinx themes or extensions.
+
+To use it, add ``sphinxcontrib.jquery`` as a Sphinx extension:
+
+.. code:: python
+
+   # conf.py
+
+   extensions = [
+       "sphinxcontrib.jquery",
+   ]
+   ...
+
+
+Configuration
+-------------
+
+.. As this is a README, we restrict the directives we use to those which GitHub
+   renders correctly. This means that we cannot use ``versionadded``,
+   ``confval``, ``warning``, or other similar directives.
+   We use a reStructuredText definition list to emulate the ``confval``
+   rendering.
+   We use inline **bold** syntax as a poor-man's ``.. warning::`` directive.
+
+``jquery_use_sri``
+   A boolean value controlling whether to enable  `subresource integrity`_ (SRI)
+   checks for JavaScript files that this extension loads.
+
+   The default is ``False``.
+
+   **Warning**: Enabling SRI checks may break documentation when loaded from
+   local filesystem (``file:///`` URIs).
+
+   *New in version 4.0.*
+
+   .. _subresource integrity: https://developer.mozilla.org/en-US/docs/Web/Security/Subresource_Integrity