Move the release process into the Sphinx documentation

Author: pradyunsg

RELEASE.rst

@@ -34,3 +34,4 @@ These roles are covered by tools like `build <https://pypa-build.readthedocs.io/
    :hidden:
 
    changelog
+   release-process

docs/index.rst

@@ -0,0 +1,19 @@
+===============
+Release Process
+===============
+
+Actual mechanics of making the release:
+
+- Update the changelog manually, and commit the changes.
+- Install :pypi:`bump2version`::
+
+    pip install bump2version
+
+- Run it to bump the version strings within the project, like::
+
+    bump2version minor
+
+- Push the commit and tags to GitHub.
+- To build and upload the distribution files, run::
+
+    flit publish