Clarify Installation Requirements to run tests locally

[JacksonBurns]

📖 Documentation

To run the tests locally, I had to do a 'full' install, i.e. pip install -e .[full] from my cloned repo and manually install pytest. If this procedure could either be clarified in the contributors document, or a more minimal dev extras section (that includes pytest) could be added to the pyproject.toml, that would be helpful.

[maclandrol]

@JacksonBurns would you like to add that to your current PR ?

[JacksonBurns]

I'm not sure, is that the intended solution? If some of the dependencies are not required for testing it would be nice to have a minimal dev package, but I don't know enough about molfeat to say.

[maclandrol]

We use conda mainly to manage our environment and dependencies. I will clarify that, but adding alternative through pip is also a good idea.

[maclandrol]

https://github.com/datamol-io/molfeat/pull/75 should address this issue.