add timeout setter for tcp

src/transport/tcp.rs

@@ -35,6 +35,11 @@ impl PacketTransportTcpWithCobs {
         })
     }
 
+    /// Calls [std::net::TcpStream::set_read_timeout].
+    pub fn set_read_timeout(&mut self, duration: Option<Duration>) -> std::io::Result<()> {
+        self.tcp_stream.set_read_timeout(duration)
+    }
+
     /// Send a packet.
     ///
     /// It encodes the packet using COBS encoding before sending it over the TCP stream.