Low pri.

For a doc block such as:

@ocaml.doc("  The top level provides some generic sort related utilities.  It also has two specialized inner modules  [`Belt.SortArray.Int`](...) and [`Belt.SortArray.String`](...)")

it'd be nice to postprocess those links so that they're clickable. The IDE supports that. Caveat: doesn't support jumping to a line, so most of the links will be useless for now.