Extend requirements file in a manner, that we can run the tests locally

[kainszs]

Hi,
I noticed while working on the last issue that I had to install additional modules to run the tests locally. I used the github actions as a guide.

Can we cover this via the requirements.txt? This does not affect the project.toml, but only for developers of the project who install it from the repository.

[Blastorios]

Do you mean the dev dependencies? They are defined the pyproject.toml and can be installed using

poetry install --with dev

Perhaps it would help to add this step to the Contributing section inside the README.

[BradyAJohnston]

The requirements.txt is just for use by the add-on inside of Blender, to generate the list of python packages which need to be installed. The required packages for installing via pip and for development are defined in the pyproject.toml.

I don't like that the packages & versions are defined twice - but currently the add-on is created from the molecularnodes/ folder, and only has access to the contents of that folder. Supporting it as both an add-on and a pypi package currently means we have to define in two places (unless someone knows a smart way to resolve this)

[BradyAJohnston]

And yes @Blastorios this should be defined in the Contributing section. I'll prioritise putting together more contributing documentation over the next couple of days.

[BradyAJohnston]

Added a CONTRIBUTING.md in #463 . I welcome input on what should also be covered / what should be made more clear. As more questions around development are answered I can ensure that they also go in there.