Implement OTA update functionality with configuration and response handling; add necessary protobuf definitions and update main loop integration

lib/ota/ota_update.hpp

@@ -0,0 +1,21 @@
+#pragma once
+
+#include "hardware.pb.h"
+#include <ESP8266WiFi.h>
+#include <ESP8266WebServer.h>
+#include <ESP8266HTTPUpdateServer.h>
+
+class OtaUpdate {
+public:
+    OtaUpdate();
+    bool configure(const hardware_SensorOTAEnable& config);
+    void update();
+    void disable();
+
+private:
+    hardware_SensorOTAEnable _config;
+    ESP8266WebServer _server;
+    ESP8266HTTPUpdateServer _httpUpdater;
+    bool _configured;
+    unsigned long _startTime;
+};