ROS2 port

[jontje]

It would be great to port the packages in this repository to ROS2.

Mainly each package's package.xml and CMakeLists.txt files would need to be adapted to ROS2.

Related: ros-industrial/abb_robot_driver#6

[gbartyzel]

@jontje @gavanderhoorn I ported this package a long time ago abb_ros2_msgs. Also, it was tested with abb_ros2 package. Should I rebase the ROS2 version to this repository?

[gavanderhoorn]

I could create a ros2 branch, and we could host it here.

[gbartyzel]

That would be great.

[gbartyzel]

@gavanderhoorn Kind reminder :)

[gavanderhoorn]

I've created the branch.

I might actually prefer using the name of the oldest ROS 2 version the packages would be compatible with though -- and then clearly state that in the readme -- that has been the ROS-Industrial policy so far.