Approbation des publications par catégorie

[Osama]

This feature is nearly done please track progress here:

Approve Topics in specific category?

The PR still needs a bit of work https://github.com/discourse/discourse/pull/5778 @xrav3nz has been pretty busy with studies. I am adding this to @Osama’s todo list to finalize the PR we should have it done in a week or two.