Add Xarray ERA5 notebook

[rabernat]

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[rabernat]

The linting here is annoying and not helpful. Could we disable for the notebooks?

[paraseba]

The linting here is annoying and not helpful. Could we disable for the notebooks?

oh yeah, could you try to add the skip to the pyproject file?

[paraseba]

@rabernat I don't think it will be too relevant, but for a fairer comparison, when you load the data with icechunk, you should do it using a fresh IcechunkStore instance. The one you have has the manifest cached, so it's probably not fetching it and parsing it.

[paraseba]

Are you planning to merge this one @rabernat ?

[rabernat]

I've made a few changes to this notebook. Please don't merge yet.

In general, I think we want to understand the role the notebooks are playing in the project. Are they documentation? Examples? Are they maintained? Tested?

My view right now is that the notebooks folder should be used to gather useful example code but shouldn't be considered official documentation. We should put a README and a disclaimer that the notebooks are loosely maintained.