some big change using state machine

lib/ota/ota.cpp

@@ -1,8 +1,8 @@
 #include <ArduinoOTA.h>
 #include "ota.h"
 
-OTAHandler::OTAHandler(std::string hostname) {
-    ArduinoOTA.setHostname(hostname.c_str());
+OTAHandler::OTAHandler(std::string_view hostname) {
+    ArduinoOTA.setHostname(hostname.data());
     ArduinoOTA.onStart([]() {
         Serial.println("OTA Start");
     });

lib/ota/ota.h

@@ -1,9 +1,9 @@
 #pragma once
-#include <string>
+#include <string_view>
 
 class OTAHandler {
 public:
-    OTAHandler(std::string hostname);
+    OTAHandler(std::string_view hostname);
 
     void poll();
 };