Add dataclass and pydantic support

[shyamd]

This PR adds support for parsing dataclass annotations and PyDantic fields as attributes of a class.

[pawamoy]

Great! I will review this tomorrow 🙂

[pawamoy]

Very good 👍

If we can get rid of the pydantic dependency this would be great. I'd rename field property to the more explicit pydantic-field, and add a pydantic-model property on such classes as well 🙂

[pawamoy]

Thanks, a few things left 🙂

[pawamoy]

Thanks again @shyamd! Really appreciate your contributions!