I think that a category on ROS discourse likely makes sense.
This is the right place to propose that. In the proposal, the main thing to do is to confirm that a category versus using a tag is the right thing to do. To that end we want to generally demonstrate that this is a category that will have a critical mass and sustain community conversation on the topic.
We don’t have a formal process for proposing categories, but you can see some past discussions:
And we do have a semi-formalized way for creating new user groups which is a good releated process to consider paralleling.
I’d like to see a proposal of the About post for the category and others who express interest in being active contributors to the category.