A working version of
#[doc = include_str!("path")]
Important to note that the path goes from the root of the project.
This project was inspired by lsp_doc and made to work on stable.
#[inline_doc("src/docs/thing/documentation.md")]
struct Thing;
#[inline_doc("src/docs/thing.md")]
fn thing() {}
When you change anything you need to restart rust-analyzer for the documentation to come into effect. rust-analyzer caches files so it wont update automatically.