feat: add accept method

Add accept method for better error handling and ergononics when only one connection is expected.
Fixes #293

Signed-off-by: Karsten Becker <567973+KarstenB@users.noreply.github.com>
Co-authored-by: Jorge Prendes <jorge.prendes@gmail.com>

Author: KarstenB

src/asynchronous/server.rs

@@ -171,6 +171,15 @@ impl Server {
         Ok(())
     }
 
+    pub async fn accept(&mut self, conn: Socket) -> std::io::Result<()> {
+        let delegate = ServerBuilder {
+            services: self.services.clone(),
+            streams: Arc::default(),
+            shutdown_waiter: self.shutdown.subscribe(),
+        };
+        Connection::new(conn, delegate).run().await
+    }
+
     pub async fn shutdown(&mut self) -> Result<()> {
         self.stop_listen().await;
         self.disconnect().await;