[ussuri][goal] Update contributor documentation

This patch updates/adds the contributor documentation to follow
the guidelines of the Ussuri cycle community goal[1].

[1] https://governance.openstack.org/tc/goals/selected/ussuri/project-ptl-and-contrib-docs.html

Story: #2007236
Task: #38524
Change-Id: I2a91b3917a3d119aec2f53cc3e65fa6cc73381c0

CONTRIBUTING.rst

@@ -1,16 +1,19 @@
-If you would like to contribute to the development of OpenStack,
-you must follow the steps in this page:
+The source repository for this project can be found at:
 
-   https://docs.openstack.org/infra/manual/developers.html
+   https://opendev.org/openstack/tosca-parser
 
-Once those steps have been completed, changes to OpenStack
-should be submitted for review via the Gerrit tool, following
-the workflow documented at:
+Pull requests submitted through GitHub are not monitored.
 
-   https://docs.openstack.org/infra/manual/developers.html#development-workflow
+To start contributing to OpenStack, follow the steps in the contribution guide
+to set up and use Gerrit:
 
-Pull requests submitted through GitHub will be ignored.
+   https://docs.openstack.org/contributors/code-and-documentation/quick-start.html
 
-Bugs should be filed on Storyboard, not GitHub:
+Bugs should be filed on Launchpad,:
 
-   https://storyboard.openstack.org/#!/project/998
+   https://bugs.launchpad.net/tosca-parser
+
+For more specific information about contributing to this repository, see the
+tosca-parser contributor guide:
+
+   https://docs.openstack.org/tosca-parser/latest/contributor/contributing.html

doc/source/contributor/contributing.rst

@@ -0,0 +1,47 @@
+============================
+So You Want to Contribute...
+============================
+For general information on contributing to OpenStack, please check out the
+`contributor guide <https://docs.openstack.org/contributors/>`_ to get started.
+It covers all the basics that are common to all OpenStack projects: the accounts
+you need, the basics of interacting with our Gerrit review system, how we
+communicate as a community, etc.
+Below will cover the more project specific information you need to get started
+with tosca-parser.
+
+Communication
+~~~~~~~~~~~~~
+* IRC channel #heat at `OFTC <https://www.oftc.net/>`
+* Mailing list (prefix subjects with ``[heat]`` for faster responses)
+  http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-discuss
+
+Contacting the Core Team
+~~~~~~~~~~~~~~~~~~~~~~~~
+Please refer the `tosca-parser Core Team
+<https://review.opendev.org/admin/groups/1f7855baf3cf14fedf72e443eef18d844bcd43fa>`_ contacts.
+
+New Feature Planning
+~~~~~~~~~~~~~~~~~~~~
+tosca-parser features are tracked on `Launchpad <https://bugs.launchpad.net/tosca-parser>`_.
+
+Task Tracking
+~~~~~~~~~~~~~
+We track our tasks in `Launchpad <https://bugs.launchpad.net/tosca-parser>`_.
+If you're looking for some smaller, easier work item to pick up and get started
+on, search for the 'low-hanging-fruit' tag.
+
+Reporting a Bug
+~~~~~~~~~~~~~~~
+You found an issue and want to make sure we are aware of it? You can do so on
+`Launchpad <https://bugs.launchpad.net/tosca-parser>`_.
+
+Getting Your Patch Merged
+~~~~~~~~~~~~~~~~~~~~~~~~~
+All changes proposed to the tosca-parser project require one or two +2 votes
+from tosca-parser core reviewers before one of the core reviewers can approve
+patch by giving ``Workflow +1`` vote.
+
+Project Team Lead Duties
+~~~~~~~~~~~~~~~~~~~~~~~~
+All common PTL duties are enumerated in the `PTL guide
+<https://docs.openstack.org/project-team-guide/ptl.html>`_.

doc/source/index.rst

@@ -31,6 +31,16 @@ Contents:
    usage
    contributing
 
+For Contributors
+================
+
+* If you are a new contributor to tosca-parser please refer: :doc:`contributor/contributing`
+
+  .. toctree::
+     :hidden:
+
+     contributor/contributing
+
 Indices and tables
 ------------------