v1.8.0: Audio 代码重构与低功耗优化 (#943)

* Reconstruct Audio Code

* Remove old IoT implementation

* Add MQTT-UDP documentation

* OTA升级失败时，可以继续使用

main/boards/m5stack-core-s3/m5stack_core_s3.cc

@@ -5,7 +5,6 @@
 #include "config.h"
 #include "power_save_timer.h"
 #include "i2c_device.h"
-#include "iot/thing_manager.h"
 #include "axp2101.h"
 
 #include <esp_log.h>
@@ -342,14 +341,6 @@ private:
         camera_ = new Esp32Camera(config);
     }
 
-    // 物联网初始化，添加对 AI 可见设备
-    void InitializeIot() {
-        auto& thing_manager = iot::ThingManager::GetInstance();
-        thing_manager.AddThing(iot::CreateThing("Speaker"));
-        thing_manager.AddThing(iot::CreateThing("Screen"));
-        thing_manager.AddThing(iot::CreateThing("Battery"));
-    }
-
 public:
     M5StackCoreS3Board() {
         InitializePowerSaveTimer();
@@ -360,7 +351,6 @@ public:
         InitializeSpi();
         InitializeIli9342Display();
         InitializeCamera();
-        InitializeIot();
         InitializeFt6336TouchPad();
         GetBacklight()->RestoreBrightness();
     }