Add ROBOTOLOGY_USES_ROS2 and ROBOTOLOGY_USES_MOVEIT options

[traversaro]

Fix #1348 .

This is still preliminary work, and it only works if -DROBOTOLOGY_PROJECT_TAGS is set to Unstable until we fix #1740 . However as it is working fine locally, I thought it was worth opening the PR to collect preliminary feedback.

For now I still need to add CI for these two options, but to test that the options are working I run:

pixi run build-ros2

I did not check if anything is working, but at least I could check that the ROS packages are correctly installed via pixi run build-ros2 && pixi run -e ros2 ros2 pkg list.

Note that the documentation is provided to enable the options with all supported way of installing dependencies (apt, conda, pixi), I just tested the option with pixi as it is faster.

This PR is also requireds icub-tech-iit/xcub-moveit2#27 to be merged and released.

[traversaro]

@martinaxgloria @Nicogene how would you like the (future, it will not be fast) conda package to be named? xcub-moveit or xcub-moveit2?

[martinaxgloria]

@martinaxgloria @Nicogene how would you like the (future, it will not be fast) conda package to be named? xcub-moveit or xcub-moveit2?

I'd like xcub_moveit2 as the name of the repository. I think that xcub_moveit could be misleading since someone could think that it is a MoveIt 1 project. But I'm also open to name the conda package without the moveit version specified

[traversaro]

This PR is missing just a tag for xcub-moveit2 and then we are ready to go. @martinaxgloria can you review the session on the required dependencies for apt in https://github.com/robotology/robotology-superbuild/pull/1746/files#diff-b335630551682c19a781afebcf4d07bf978fb1f8ac04c6bf87428ed5106870f5R151 . For the conda-forge ones I tested it in CI, but for apt I do not plan to add CI for now (too much effort in mantainance).

[martinaxgloria]

Hi @traversaro, everything seems ok to me, thanks

[traversaro]

The Windows ROS2 CI fails due to the length of the build path. There are several possible workarounds, but to unblock the build let's skip the CI for now.