Update the space_robots workflow to run the demo simulations

[mkhansenbot]

I'm not sure if this is possible in GHA, but ideally, we should have a test that runs the demos by using the run.sh script to start a headless simulation in gazebo.

[ivanperez-keera]

I would love to see that happen. I didn't even think about running it headless.

That being said, it looks like this could be non-trivial (and please correct me if I'm wrong). Especially detecting that it's running correctly, since there is no clear end condition.

What do you guys think about making some of the less clear issues (or the ones where it's less clear if we'll have the time/resources to do it) to discussions, to keep the issues list a bit shorter and more manageable?

[Bckempa]

While testing for "correctness" could definitely be a rabbit-hole, smoke-testing that the sim can start-up cleanly is definitely well-scoped for a ticket and would significantly improve the types of errors we can catch in CI. I think we should take this on for the April release.

[mkhansenbot]

Added to next milestone (proposed) humble-2024.04.0