Reorganize method routers for handlers and services (#405)

* Re-organize method routing for handlers

* Re-organize method routing for services

* changelog

examples/websockets/src/main.rs

@@ -12,9 +12,9 @@ use axum::{
         ws::{Message, WebSocket, WebSocketUpgrade},
         TypedHeader,
     },
-    handler::get,
     http::StatusCode,
     response::IntoResponse,
+    routing::{get, service_method_router as service},
     Router,
 };
 use std::net::SocketAddr;
@@ -35,7 +35,7 @@ async fn main() {
     let app = Router::new()
         .nest(
             "/",
-            axum::service::get(
+            service::get(
                 ServeDir::new("examples/websockets/assets").append_index_html_on_directories(true),
             )
             .handle_error(|error: std::io::Error| {