docs(lib): Add a description to the oneshot-senders

src/lib.rs

@@ -7,6 +7,8 @@ pub mod macros {
 }
 
 pub mod oneshot {
+    //! This module provides a synced version of tokio's oneshot channel.
+    //! Notably this is implemented as wrapper around std's mpsc channel, which closes after one received value
     use std::{
         mem,
         sync::mpsc::{self, RecvError, SendError, TryRecvError},