Add support for extraction of types from docstring

[ilevkivskyi]

We could support at least Google style and Numpydoc

[jussike]

any progress about this?

[cclauss]

Is Google style like internetarchive/openlibrary#6755 ?

• https://google.github.io/styleguide/pyguide.html#383-functions-and-methods has shifted to type hints.

[ilevkivskyi]

@jussike I don't have any immediate plans for this, but open to contributions. (The only requirement, this feature should be behind a flag and type comments should take precedence over docstring types if both are present.)

@cclauss IIUC old Google style is more like

    Args:
        param_name (type): description.
        ...
    Returns:
        type: description.

What you show is what PyCharm uses (also popular style btw)