Separate ROS and Python packages

[DLu]

Rather than doing the full local setup it would be nice to be able to do the pip install of the package, and then just clone the ROS packages to get them to work together. That would be a good first step for releasing the ROS packages as binaries.

[sea-bass]

Yes, that would be nice now that there are actually "stable" releases of this tool.

The part that psyched me out about doing that is also not knowing how to make sure the pip dependencies of pyrobosim also get installed. Any ideas how to go about that? Because I couldn't figure it out / wasn't interested enough to dig further.

Edit: to be clearer, I'm asking what the process would be to have ROS-free pyrobosim be installed when you apt-install the pyrobosim_ros binary?

[sea-bass]

As of #246, at least now you can get around the pip install and actually run colcon build to install the non-ROS core package. So that's some progress...

Next up, the adjustText, astar, pycollada, and PySide6 packages need to be added to the rosdep Python lists, if anyone sees this and wants to take it up.