Adds docs links to bindings bits

This adds a bindings section to the docs which has links to both the
Ruby and Python bindings, the core bindings, and the REST api browsable
docs for both too.

https://pulp.plan.io/issues/4844
closes #4844

docs/bindings.rst

@@ -0,0 +1,53 @@
+Client Bindings
+===============
+
+Python Client
+-------------
+
+The `pulp-ansible-client package <https://pypi.org/project/pulp-ansible-client/>`_ on PyPI provides
+bindings for all API calls in the `pulp_ansible API documentation <../restapi.html>`_. It is
+currently published daily and with every RC.
+
+The `pulpcore-client package <https://pypi.org/project/pulpcore-client/>`_ on PyPI provides bindings
+for all API calls in the `pulpcore API documentation <https://docs.pulpproject.org/en/3.0/nightly/
+restapi.html>`_. It is currently published daily and with every RC.
+
+
+Ruby Client
+-----------
+
+The `pulp_ansible_client Ruby Gem <https://rubygems.org/gems/pulp_ansible_client>`_ on rubygems.org
+provides bindings for all API calls in the `pulp_ansible API documentation <../restapi.html>`_. It
+is currently published daily and with every RC.
+
+The `pulpcore_client Ruby Gem <https://rubygems.org/gems/pulpcore_client>`_ on rubygems.org provides
+bindings for all API calls in the `pulpcore API documentation <https://docs.pulpproject.org/en/3.0/
+nightly/restapi.html>`_. It is currently published daily and with every RC.
+
+
+Client in a language of your choice
+-----------------------------------
+
+A client can be generated using Pulp's OpenAPI schema and any of the available `generators
+<https://openapi-generator.tech/docs/generators.html>`_.
+
+Generating a client is a two step process:
+
+**1) Download the OpenAPI schema for pulpcore and all installed plugins:**
+
+.. code-block:: bash
+
+    curl -o api.json http://<pulp-hostname>:24817/pulp/api/v3/docs/api.json
+
+The OpenAPI schema for a specific plugin can be downloaded by specifying the plugin's module name
+as a GET parameter. For example for ``pulp_ansible`` only endpoints use a query like this:
+
+.. code-block:: bash
+
+    curl -o api.json http://<pulp-hostname>:24817/pulp/api/v3/docs/api.json?plugin=pulp_ansible
+
+**2) Generate a client using openapi-generator.**
+
+The schema can then be used as input to the openapi-generator-cli. The documentation on getting
+started with openapi-generator-cli is available on
+`openapi-generator.tech <https://openapi-generator.tech/#try>`_.

docs/index.rst

@@ -25,7 +25,8 @@ Table of Contents
 
    installation
    workflows/index
-   restapi/index
+   restapi
+   bindings
 
 
 Indices and tables