Multiple modules pyproject file

[JoelBender]

I've been following this issue and comment and made a fork of the example with the intent to provide a Pipfile and a pyproject.toml file. Following the scikit_build_example, I can't seem to find a way to get the python3 -m build to recognize that the CMakeLists.txt file is located in the src directory, and how that is related to the files in the cmake directory.

A followup question is what to do with the BipedalLocomotion directory references, is that intended to be the name of the module?