[#133] Add a page to the userguide explaining unsupported settings.

docs/userguide/unsupported.md

@@ -0,0 +1,17 @@
+Not all features or settings of a GitHub organization and its associated resources can be managed 
+by the means of `otterdog`. The following non-exhaustive list outlines settings that are currently not supported:
+
+- setting the profile picture of an organization or a social media preview for a repository [#119](https://gitlab.eclipse.org/eclipsefdn/security/otterdog/-/issues/119)
+- manage default repository labels on organization level
+- manage custom properties
+- organization rulesets (only rulesets on repo level are supported atm)
+- secrets and variables for codespaces and dependabot
+- managing GitHub apps or oauth policies
+- managing pinned repositories for an organization
+- enabling private vulnerability reporting [#27](https://gitlab.eclipse.org/eclipsefdn/security/otterdog/-/issues/27)
+- tag protections [#143](https://gitlab.eclipse.org/eclipsefdn/security/otterdog/-/issues/143)
+- supporting merge queue settings for a branch protection rule [#86](https://gitlab.eclipse.org/eclipsefdn/security/otterdog/-/issues/86)
+
+Most of the unsupported settings are only accessible via the Web UI of GitHub. 
+In case you would like to have a specific feature of GitHub being supported by `otterdog`,
+please open a ticket [at](https://gitlab.eclipse.org/eclipsefdn/security/otterdog/-/issues/new).

mkdocs.yml

@@ -69,6 +69,7 @@ nav:
         - Validate: reference/operations/validate.md
 - User Guide:
     - Renaming of Resources: userguide/renaming.md
+    - Unsupported Settings: userguide/unsupported.md
 
 - Contribute: contributing.md