Group Level Wiki: FE Add new group settings to toggle wiki
Problem to solve
Group wikis need to be managed in the group settings, just like project wikis:
- Enable/disable wiki.
We need to be able to disable the Group-level Wiki. This issue implements the necessary FE changes (adding new fields to the form, and persisting them through an API).
This issue is not about setting the default for all projects contained within a group. It is also not about controlling visibility of the item in the left navigation separate from the feature availability. The behavior should be consistent with the project-level setting — turning off the Wiki at the group level should disable the group Wiki entirely.
Permissions and Security
Permissions are documented in #208412 (closed), these should be respected on the FE.