Core Docs Refactor and Redesign (#36067)

* Docs refactor as outlined in https://github.com/ansible/proposals/issues/79. Moves content into 'guides'; refactors TOC; fixes CSS; design tweaks to layout and CSS; fixes generated plugin, CLI and module docs to fix links accodingly; more.

* Adding extra blank line for shippable

docs/docsite/rst/plugins/plugins.rst

@@ -0,0 +1,38 @@
+********************
+Working With Plugins
+********************
+
+Plugins are pieces of code that augment Ansible's core functionality. Ansible uses a plugin architecture to enable a rich, flexible and expandable feature set.
+
+Ansible ships with a number of handy plugins, and you can easily write your own.
+
+This section covers the various types of plugins that are included with Ansible:
+
+.. toctree:: 
+   :maxdepth: 1
+
+   action
+   cache
+   callback
+   connection
+   inventory
+   lookup
+   shell
+   strategy
+   vars
+   playbooks_filters
+   playbooks_tests
+   ../user_guide/plugin_filtering_config
+
+.. seealso::
+
+   :doc:`playbooks`
+       An introduction to playbooks
+   :doc:`config`
+       Ansible configuration documentation and settings
+   :doc:`command_line_tools`
+       Ansible tools, description and options
+   `User Mailing List <http://groups.google.com/group/ansible-devel>`_
+       Have a question?  Stop by the google group!
+   `irc.freenode.net <http://irc.freenode.net>`_
+       #ansible IRC chat channel