feat: add MQTT support and configuration documentation

client/bin/src/main.rs

@@ -414,6 +414,10 @@ fn main() -> ExitCode {
                 if device_online == true {
                     // Render new image
                     send_package(ip.to_string(), &last_data, &straba_res);
+                    // Publish data to MQTT
+                    if let Some(ref client) = mqtt_client {
+                        publish_to_mqtt(client, &last_data, &straba_res);
+                    }
                 }
             }
         }