docs(contributing): add CONTRIBUTING.rst

Signed-off-by: Patrick Avery <patrick.avery@kitware.com>

Author: psavery

CONTRIBUTING.rst

@@ -0,0 +1,19 @@
+================================
+Contributing to trame-matplotlib
+================================
+
+#. Clone the repository using ``git clone``
+#. Install pre-commit via ``pip install pre-commit``
+#. Run ``pre-commit install`` to set up pre-commit hooks
+#. Make changes to the code, and commit your changes to a separate branch
+#. Create a fork of the repository on GitHub
+#. Push your branch to your fork, and open a pull request
+
+Tips
+####
+
+#. When first creating a new project, it is helpful to run ``pre-commit run --all-files`` to ensure all files pass the pre-commit checks.
+#. A quick way to fix ``black`` issues is by installing black (``pip install black``) and running the ``black`` command at the root of your repository.
+#. Sometimes, ``black`` and ``flake8`` do not agree. Add options to your ``.flake8`` file to fix these things. See the `flake8 configuration docs <https://flake8.pycqa.org/en/latest/user/configuration.html>`_ for more details.
+#. A quick way to fix ``codespell`` issues is by installing codespell (``pip install codespell``) and running the ``codespell -w`` command at the root of your directory.
+#. The `.codespellrc file <https://github.com/codespell-project/codespell#using-a-config-file>`_ can be used fix any other codespell issues, such as ignoring certain files, directories, words, or regular expressions.