Get the ccdhmodel python code into PyPI as a package

[turbomam]

Possibly by taking advantage of the new linkml/linkml-model-template

It shouldn't be necessary to manually copy ccdhmodel.py and ccdhmodel.yaml into cancerDHC/example-data

From @gaurav:
The main things we want from the new template are:

• standardization: the goal is that any other LinkML user should be able to look at our repository and figure out pretty quickly where the artifact they want is located, or how to modify the schema -> artifact build process.
• pick up @hsolbrig's publish-to-pypi code, so that the generated Python module can be published to PyPi.

[gaurav]

I think cancerDHC/example-data#22 shows that the crdch-model package in PyPI is working correctly. I'll close this issue for now; please feel free to reopen it or open a new issue if the crdch-model package isn't working correctly for any reason.

[gaurav]

Ah, now I remember, this is open until PR #122 is merged. Reopening.

[turbomam]

Ah, now I remember, this is open until PR #122 is merged. Reopening.

I approved #122 but didn't merge in case @sujaypatil96 wanted to weigh in