[qsr_prob_rep] Add easy conversions script example

[cdondrup]

Showing how to use raw data and the qsr_lib to generate input for the qsr_prob_lib. Currently something like this can be found here: https://github.com/strands-project/strands_hri/blob/hydro-devel/hrsi_representation/scripts/offline_qtc_creator.py which uses a lot of stuff that is not particularly easy to read as an example.