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/tuple_via.rs

@@ -0,0 +1,16 @@
+use axum_macros::FromRequest;
+use axum::extract::Extension;
+
+#[derive(FromRequest)]
+struct Extractor(#[from_request(via(Extension))] State);
+
+#[derive(Clone)]
+struct State;
+
+fn assert_from_request()
+where
+    Extractor: axum::extract::FromRequest<axum::body::Body>,
+{
+}
+
+fn main() {}