Hyperlinks to external official documentation

Expected Behavior

When using -c show_types_annotations (found in #6), hyperlinks to external references should be added not only on the method declaration but also in the doc below (that is my understanding from https://pdoc3.github.io/pdoc/doc/pdoc/#linking-to-other-identifiers).

Actual Behavior and steps to reproduce

Example:

def example_method(a: datetime) -> int:
    """

    Parameters
    ----------
    a : `datetime.datetime`
        A date.

    Returns
    -------
    `int`
        The day.
    """

    return a.day

While the page renders as follows:

if using --http. When using --html, type hints are even completely omitted :

I guess the proper behavior would be to have the hyperlinks both in the method declaration in the first line and in the text below.
Moreover, it would likely be ideal to link to the official documentation, such as this for datetime

Additional info

• pdoc version: 0.6.3

Start by reproducing the example with pdoc 0.6.3 using both --http and --html, and trace the rendering of type annotations and docstring parameter or return types. Done means external references are linked in both the method declaration and the documentation text, with the reported --html omission addressed; the issue also suggests official Python documentation links for types such as datetime.