docs: add release workflow page

docs/src/blog/why-monorepo.md

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 ---
-visibility: hidden
 authors:
 - name: Oliver Schlüter
   email: oliver@fancyplugins.de

docs/src/development-guidelines/release-workflow.md

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+# Release Workflow
+
+This document describes the steps to be taken when releasing a new version of a plugin.
+
+## Before the release
+
+1. Make sure that all relevant changes are noted in the `CHANGELOG.md` file
+2. Manually test all changes and make sure that all existing features are still working as expected
+3. Update all dependencies to the latest version
+4. Optional: give out a pre-release version to the community for testing
+
+## Release
+
+1. Update the version number in the `VERSION` file
+2. Update the supported versions in the deployment config files, if necessary
+3. Commit and push the changes
+4. Create a new tag with the version number
+5. Copy the changelog to the changelog page on the documentation website
+6. Run the deployment workflow
+7. Confirm that the deployment was successful
+8. Send out a message to the community that a new version is available
+
+## After the release
+
+1. Clear the `CHANGELOG.md` file, so that it is ready for the next release
+2. Wait for feedback from the community