We need to introduce a contributable menu to the Debug: Start view such that each extension can contribute commands tehre.

We would have to enforce when context on top of these contributed commands just so the view does not end up being a jungle. For example when activeFile is python add the python commands.

An open question is how these contributed commands would look like, would it also be a blue button, or is there a ... affordance which when clicked shows all the contributed commands.