Add doc aliases

[GuillaumeGomez]

Some objects have to get their crate's name prepended so they don't get confused with the type from another crate (like GtkApplication for example). Maybe adding a #[doc(alias = "Application")] for these types would help the search in the docs?

[EPashkin]

IMHO this is good idea

[GuillaumeGomez]

We could add a new key with doc_alias = "Something". However, I didn't stabilize the doc alias feature in rustdoc yet (the PR is open though: rust-lang/rust#63236).

[sdroege]

@GuillaumeGomez This is fixed or not?

[GuillaumeGomez]

Oh right, #[doc(alias = "...")] is stable now. I should do that. :)

[sdroege]

@GuillaumeGomez That's #1014 or not?

[GuillaumeGomez]

No, not exactly. Here it's about adding the possibility to have an alias over a type. For example, we renamed gtk::Application to gtk::GtkApplication.