Per-category post approval

[Osama]

This feature is nearly done please track progress here:

Approve Topics in specific category?

The PR still needs a bit of work FEATURE: per-category approval settings by xrav3nz · Pull Request #5778 · discourse/discourse · GitHub @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.