Resolve simple declarative macros in #[doc = ...]

[not-my-profile]

A common use case would be #[doc = include_str!("../../README.md")]. Such include calls currently do not appear to be resolved by rust-analyzer (hovering over the identifier doesn't show the documentation from the README).

It would be great if rust-analyzer could additionally resolve simple custom declarative macros in #[doc = ...], e.g:

macro_rules! link {
    ($label:literal, $path:literal) => {
        concat!("[", $label, "](https://example.com/some/path", $path, ")")
    };
}

#[doc = link!("foo", "/bar.html")]
struct Foo;

[Veykril]

Duplicate of #8092