Create a new message ROS2 Dashing

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You may read this book Ros in 5 days https://amzn.to/3421znq it deliver a good starting point. I read it right now.

It does say at the top of the tutorial that it is incomplete:

it is likely outdated and should not be expected to compile as is

Also, the tutorials repository is not being actively updated. Refer to the examples and demos packages instead:

• https://github.com/ros2/examples
• https://github.com/ros2/demos

For an example of building a new message, you can check out the example_interfaces package: https://github.com/ros2/example_inter...

Or look at the action tutorial: https://index.ros.org/doc/ros2/Tutori...