Add debug flag and architecture error message

[PicoCentauri]

This PR adds two usability features for the CLI

1. By default the usual error traceback to the code is disabled, but the error original message is still printed. One can enable the traceback again by using the new --debug flag.
2. Wrap all calls to an architecture with custom try-except block. If an error is raised in this block we reraise the error with extra message that this error is most likely not our fault.

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📚 Documentation preview 📚: https://metatensor-models--80.org.readthedocs.build/en/80/

[frostedoyster]

I feel this will make our users think they're dealing with a collection of models rather
than a piece of useful software (and therefore will not give us credit)

Suggested change

	f"{exception}\n\nThis error originates from an architecture, and is likely "
	"not a problem with metatensor-models."
	f"{exception}\n\nThis error originates from an architecture. If you think this is "
	"a bug, you can contact its maintainer (see the architecture's documentation)."

[PicoCentauri]

Yes this is a better. I will change it and also swap the order. First the we give the test and below state the error message.

[frostedoyster]

Suggested change

	with pytest.raises(ArchitectureError, match="not a problem with metatensor-models"):
	with pytest.raises(ArchitectureError, match="you can contact its maintainer"):

[PicoCentauri]

Can you take another final look @frostedoyster. I saw that a couple of tests are basically not testing the output of an error raise. sorry.

[frostedoyster]

Thanks a lot!