usage not propagated/counted for aliased funcs/types

[sdancer]

import gleam/erlang/atom.{type Atom, create_from_string as atom}

throws a warning, create_from_string is unused

[lpil]

Thank you.

This system is due to be replaced with a proper reference graph based approach so we can either fix it or replace it. Both are good solutions.

[lpil]

Closing to track in other issue