v12.1.0

[drfenixion]

Improvements:

1. Added 'multicopter_sverk' robot type.
   This type will be used by external code generator for generate Sverk framework (PX4 v1.16 based) packages for your multicopter.

Fixes:

1. Added limit tag (with velocity and effort) for continious joint (fix rqt_joint_trajectory_controller error rqt_joint_trajectory_controller bug with missed limit tag of continious joint ros-controls/ros2_controllers#2390)

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This discussion was created from the release v12.1.0.