Move rustdoc-related code to `rustdoc` crate (#12945)
This PR moves the rustdoc-related code out of `html_to_markdown` and
into the `rustdoc` crate.
Release Notes:
- N/A
6fa347dff7Marshall Bowers committed on 6/12/2024, 7:53:05 PM· committed by GitHubparentc3df9b7