Add Minimum Reproducible Examples for each sensor to README.md

[PurpleRabbit75]

I'm trying to build a ROS2 system with a VLP-32C, but there does not seem to be any documentation in existence on how to use it with this driver in a practical script. I'm very glad it's compatible--truly, I really appreciate your guy's work--but the lack of documentation and examples is frustrating.

I would really appreciate some minimum reproducible examples of this library in action for the various sensors in the README or in the ROS docs (https://wiki.ros.org/velodyne/Tutorials/Getting%20Started%20with%20the%20HDL-64E). For example, a short script where you write the data to a .bag file, or display it with rviz.

Thank you all so much for your work in this!

[valgur]

For scripting purposes you might find the velodyne_decoder Python library to be a much more convenient option: https://github.com/valgur/velodyne_decoder

It's originally derived from this driver, but has been extended to need zero configuration to get started - the model and RPM info is deduced automatically from the data itself. Its output is NumPy arrays together with accurate timing info. Also supports decoding of dual-return data.

I have not updated the direct bag reading convenience functions to support ROS2, though, but it should be pretty straightforward to adapt the existing ROS1 version: https://github.com/valgur/velodyne_decoder/blob/master/src/velodyne_decoder/bag.py