Move axum-debug into axum-macros (#724)

* Move axum-debug into axum-macros

* fix ref to axum-macros in changelog

* Apply suggestions from code review

Co-authored-by: Jonas Platte <[email protected]>

Co-authored-by: Jonas Platte <[email protected]>

axum-macros/tests/from_request/pass/container.rs

@@ -0,0 +1,22 @@
+use axum::{
+    body::Body,
+    extract::{rejection::JsonRejection, FromRequest, Json},
+};
+use axum_macros::FromRequest;
+use serde::Deserialize;
+
+#[derive(Deserialize, FromRequest)]
+#[from_request(via(Json))]
+struct Extractor {
+    one: i32,
+    two: String,
+    three: bool,
+}
+
+fn assert_from_request()
+where
+    Extractor: FromRequest<Body, Rejection = JsonRejection>,
+{
+}
+
+fn main() {}