including ModelBuilder intro notebook

[michaelraczycki]

This PR includes the introduction of new module of PyMC-experimental, ModelBuilder.

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📚 Documentation preview 📚: https://pymc-examples--565.org.readthedocs.build/en/565/

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[drbenvincent]

Hi @michaelraczycki. Looks like this could be pretty cool. Before diving in to a proper review, a few changes are needed:

• I'd pick a simpler name for the notebook, ideally no spaces. This will be useful if/when it comes to using sphinx to reference between notebooks in the docs.
• Placing the notebook inside a new folder model_builder will create a new section in the docs. I don't think we need a complete section on the module builder. Instead, I'd recommend putting it in the howto folder/section.
• Notebooks for pymc-examples have a reasonably hefty set of formatting and style requirements. There's a very useful guide here https://www.pymc.io/projects/docs/en/latest/contributing/jupyter_style.html which in turn has links to a video and a template notebook.

Just give me a shout when it's ready for re-review.

[michaelraczycki]

@drbenvincent I think that all the formatting should be there now

[twiecki]

I don't think we should add the same NB from pymc-marketing here. Instead, we should update https://github.com/pymc-devs/pymc-examples/blob/main/examples/howto/model_builder.ipynb to the latest API.

[twiecki]

@michaelraczycki There's 2 NBs here, is that on purpose? Also, the pre-commit should generate a myst file that should be included here too.

[michaelraczycki]

you're right, for some reason the deletion of the model_builder folder and it's notebook didn't get committed. It's fixed now