Group Level Wiki: FE moving existing HAML views to Group context (except Edit Wiki view)

What to do

The wiki rendering is something that's currently not planned to be done in Vue any time soon. Therefore we need to make the rendering which is done in HAML available on the group level as well.

As this is mostly touch Views, frontend should be able to do this quite independently. There might be the need to pull in the right endpoints or datasets

Assumptions

Backend is ready to provide the data that's needed to render the wiki. Whoever is working on it, needs to confirm with backend

Success Criteria

• There's a feature flag available behind which the group level wiki will be accessible
• Partialized the Wiki View to reuseable pieces
• Group Level Wiki can now render wiki content
• Rspec level test verifiying the wiki can be accessed on a group level