tower: Some tooling to visualise the links.

[lkorenc]

Prerequisites

• I have read the documentation and the proposed feature is not implemented.

Description

While vast-repl can dump the link in some form, it is not really usable on larger modules. We want something better that can ideally render the endpoints of a link next to each other and do some colour coding/on hover highlight of what is link with what.

This will be super helpful for presentation to others and internal debugging.