Add axum support for pretty wrapper.

Author: Conner-PYS

html-node-core/src/http.rs

@@ -2,11 +2,17 @@
 mod axum {
     use axum::response::{Html, IntoResponse, Response};
 
-    use crate::Node;
+    use crate::{pretty::Pretty, Node};
 
     impl IntoResponse for Node {
         fn into_response(self) -> Response {
             Html(self.to_string()).into_response()
         }
     }
+
+    impl IntoResponse for Pretty {
+        fn into_response(self) -> Response {
+            Html(self.to_string()).into_response()
+        }
+    }
 }