feat: create github learning lab for usage of cookiecutter-python template

[martinm82]

Since the cookiecutter itself has not the ability to easily add comments during the process of generating a new project (currently it shows you only the cookiecutter variable name and possible values) it would be good to have a simple Github learning lab showing how to create easily projects.

This would then explain step by step all the available variables and show the user what exactly to do.