updated plugin docs (#30490)

* updated  docs

- for devs:
  - added inventory/vars section
  - made some updates to general section and other plugin types
- for users:
 - added 'user' plugin section to start describing the plugins
 - docs on types, what they are and how to use

- removed ref to deleted AUTHORS file
- corrected several typos/headers
- added descriptions to config.rst template
- ignore generated files for cli/plugins and config
- remove new generated files on `make clean`
- moved details from devguid and intro doc to plugin specific pages
- pretied up lookup notes
- changed precedence ref to not conflict config
- removed duplicate config data, as config is autogenerated and up to date
- put new plugins under playbooks
- added `pass` cause rst/python dislikes fractions
- removed dupe in .gitignore, alpha sorted to avoid moar dupes
- added try cause rst/python freaks out

* generate plugins into their own dir

only do plugins that support docs
use toctree from main plugins page

docs/templates/config.rst.j2

@@ -6,9 +6,42 @@
 {{name}}
 {{ '=' * name_len }}
 
+Ansible supports a few ways of providing configuration variables, mainly through environment variables, command line switches and an ini file `ansible.cfg`.
+
+Starting at Ansible 2.4 the `ansible-config` utility allows users to see all the configuration settings available, their defaults, how to set them and
+where their current value comes from. See :doc:ansible-config for more information.
+
+
+The configuration file
+======================
+
+Changes can be made and used in a configuration file which will be searched for in the following order::
+
+ * ANSIBLE_CONFIG (environment variable if set)
+ * ansible.cfg (in the current directory)
+ * ~/.ansible.cfg (in the home directory)
+ * /etc/ansible/ansible.cfg
+
+Ansible will process the above list and use the first file found, all others are ignored.
+
+.. note:: Comments
+    The configuration file is one variant of an INI format.
+	Both the hash sign ("#") and semicolon (";") are allowed as
+    comment markers when the comment starts the line.
+    However, if the comment is inline with regular values,
+    only the semicolon is allowed to introduce the comment.
+	For instance::
+
+        # some basic default values...
+        inventory = /etc/ansible/hosts  ; This points to the file that lists your hosts
+
+
 Common Options
 ==============
 
+This is a copy of the options available from our release, your local install might have extra options due to additional plugins,
+you can use the command line utility mentioned above (`ansible-config`) to browse through those.
+
 {% if config_options %}
 
 

docs/templates/man.j2

@@ -104,7 +104,6 @@ AUTHOR
 ------
 
 Ansible was originally written by Michael DeHaan.
-See the AUTHORS file for a complete list of contributors.
 
 
 COPYRIGHT