Change package prefix to ros- or ros2-

[baszalmstra]

This implements the behavior discussed in #97. Packages are no longer prefixed with ros-<distro>- but instead with ros- for ROS1 and ros2- for ROS2.

Closes #97

[traversaro]

Personally I would strongly prefer to also generate the old name, at least for a deprecation period, that from what I understand what was we had consensus on #97 (comment) . I really prefer to avoid breaking all existing robostack examples and existing human and llm knoledge (and I am happy to work on adding that).

[baszalmstra]

Makes sense. But then we let those point to the renamed packages instead of the other way around.

[traversaro]

Makes sense. But then we let those point to the renamed packages instead of the other way around.

Yes, sure!