Fix Documentation how_to_release (#356)

Author: Jannis-Mittenzwei

doc/developer_guide/developer_guide.rst

@@ -8,6 +8,6 @@
     :maxdepth: 2
 
     ../design
-    development
     plugins
     modules/modules
+    ../user_guide/how_to_release

doc/developer_guide/development.rst

@@ -1,12 +1,79 @@
 How to Release?
 ===============
 
-#.  Use :code:`nox -s release:prepare` to prepare the project for a new release.
-#.  Merge your **Pull Request** to the **default branch**
-#.  Use :code:`git remote show origin | sed -n '/HEAD branch/s/.*: //p'` to output the **default branch**
-#.  Use :code:`git checkout <default branch>` Switch to the **default branch**
-#.  Use :code:`git pull` to update branch
-#.  Use :code:`TAG=<name>` to set a variable named **"TAG"**
-#.  Use :code:`git tag "${TAG}"` to create a new tag in your repo
-#.  Use :code:`git push origin "${TAG}"` to push it to remote
-#.  GitHub workflow **CD** reacts on this tag and starts the release process
+Creating a Release
+++++++++++++++++++
+
+1. Set a variable named **TAG** with the appropriate version numbers:
+
+    .. code-block:: shell
+
+        TAG="<major>.<minor>.<patch>"
+
+#. Prepare the project for a new release:
+
+    .. code-block:: shell
+
+        nox -s release:prepare -- "${TAG}"
+
+#. Merge your **Pull Request** to the **default branch**
+#. Switch to the **default branch**:
+
+    .. code-block:: shell
+
+        git checkout $(git remote show origin | sed -n '/HEAD branch/s/.*: //p')
+
+#. Update branch:
+
+    .. code-block:: shell
+
+        git pull
+
+#. Create a new tag in your local repo:
+
+    .. code-block:: shell
+
+        git tag "${TAG}"
+
+#. Push the repo to remote:
+
+    .. code-block:: shell
+
+        git push origin "${TAG}"
+
+    .. hint::
+
+         GitHub workflow **.github/workflows/cd.yml** reacts on this tag and starts the release process
+
+What to do if the release failed?
++++++++++++++++++++++++++++++++++
+
+The release failed during pre-release checks
+--------------------------------------------
+
+#. Delete the local tag
+
+    .. code-block:: shell
+
+        git tag -d "${TAG}"
+
+#. Delete the remote tag
+
+    .. code-block:: shell
+
+        git push --delete origin "${TAG}"
+
+#. Fix the issue(s) which lead to the failing checks
+#. Start the release process from the beginning
+
+
+One of the release steps failed (Partial Release)
+-------------------------------------------------
+#. Check the Github action/workflow to see which steps failed
+#. Finish or redo the failed release steps manually
+
+.. note:: Example
+
+    **Scenario**: Publishing of the release on Github was successfully but during the PyPi release, the upload step got interrupted.
+
+    **Solution**: Manually push the package to PyPi