Add header to import limits from standard URDF definition (backport #1298)

[mergify]

This is an automatic backport of pull request #1298 done by Mergify.
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Changes to be committed:
	new file:   joint_limits/include/joint_limits/joint_limits_urdf.hpp
	modified:   joint_limits/package.xml
	new file:   joint_limits/test/joint_limits_urdf_test.cpp

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   joint_limits/CMakeLists.txt

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[christophfroehlich]

fails because we didn't backport #926 and #1181. Should we? @ros-controls/ros2-maintainers @saikishor?

[saikishor]

I don't know how backportable #926, if it is backportable, I think it's worth doing. If not, I can create another PR, fixing these conflicts locally.

[bmagyar]

Hmm... I'd even entertain the option of.not backporting this. Are there motivated users?

[christophfroehlich]

Hmm... I'd even entertain the option of.not backporting this. Are there motivated users?

https://robotics.stackexchange.com/questions/109547/why-my-ros2-control-has-no-fun-joint-limits-urdf-hpp
#1416

[bmagyar]

I think #926 wasn't really backportabke without breaking changes to all the install locations if I remember well... If you guys want to backport the current PR, I'd suggest a manual approach

[destogl]

This is probably not worth it. It would be better to have master compilable on humble. Much more value.

[christophfroehlich]

This is probably not worth it. It would be better to have master compilable on humble. Much more value.

Almost there ros-controls/ros2_control_ci#30