Support Interval type and check compatibility with pydantic

[HDembinski]

This adds support for the Interval annotation type that is in the package annotated_types and pydantic, which was previously missing. It also adds tests for float annotations from annotated_types and pydantic, to check that they are correctly handled by util.describe

[HDembinski]

@matthewfeickert I requested a review from you, because Github suggested it. Maybe it knows that you have been dealing with pydantic or Annotated types?

[matthewfeickert]

I requested a review from you, because Github suggested it. Maybe it knows that you have been dealing with pydantic or Annotated types?

Thanks @HDembinski. Perhaps GitHub knows from my browsing that I want to get more into Pydantic, but I must admit that I really have zero experience with it so far and so don't think I can give you any useful review.

If you do want someone with lots of Pydantic experience I would suggest adonath (who I think you know?) and gave a great Pydantic tutorial at SciPy 2023.

[HDembinski]

@adonath If you have the time, it would be great if you had a look over how iminuit is starting to support restricted float type from pydantic and annotated_types. The idea is to use them to declare limits on model parameters when specifying the model, instead of setting those limits when calling Minuit.

[HDembinski]

I am going to merge now, since it is not a controversal addition to the functionality that was already there.