Docstring references could have links that goto def on the reference

[rchiodo]

Given a docstring like so:

You can see that there a func references. These references are generally to modules inside the current one, meaning we could theoretically find them.

It would be super cool to turn these into clickable links that jump to the other reference. Like sphinx does:

We could also do this automatically in spots where we know something is a type. Like parameter types.