Simple offboard movement

[olliglorioso]

Here is a Python script in src/examples/offboard_py/maneuver.py that performs two rounds of movements with different speeds (0.5 and 0.2, not m/s). The script is tested, and it works with any starting position/height:

• Go to height 8m
• Go to height 6m and stay in 6m
• Go to x + 4m
• Go back
• Go to y + 4m
• Go back
• Rotate 360
• Rotate back

Relevant files for this commit is

• src/examples/offboard_py/maneuver.py
• CMakeLists.txt (adds the script to the Python package)

How will we run this (add documentation later) assuming the bridge is running:

cd xxxx/px4_ros_com

ros2 run px4_ros_com offboard_control # start offboard node

ros2 bag record /fmu/out/vehicle_local_position

ros2 run px4_ros_com maneuver.py # start the script