Rename joint state hint to nullspace component (#73)

Author: sjahr

moveit_studio_msgs/moveit_pro_controllers_msgs/msg/VelocityForceCommand.msg

@@ -34,4 +34,4 @@ geometry_msgs/Wrench wrench
 # Nullspace parameter to be optionally used for secondary control goal.
 # Empty array will be ignored, otherwise array length must match number of degrees-of-freedom.
 # These can be modified at any time, and the controller should do its best to minimize joint-space costs if a nullspace controller is implemented.
-float64[] joint_state_hint
+float64[] nullspace_component