feat: Implement Discord app UI and settings management

- Added MainUI class for displaying voice state, status icon, and buttons.
- Introduced MainUIHandler to manage UI interactions and bridge communication.
- Created SettingsUI for displaying QR code and configuration instructions.
- Implemented SettingsUIHandler to manage settings and web server interactions.
- Developed WebHandler for handling HTTP requests for settings configuration.
- Updated AppRegistry to initialize with the new Discord app descriptor.
- Enhanced InteractionHandler to support keyboard interactions across app switches.
- Updated UIHandler to manage app switching and rendering of app icons.
- Enabled QR code support in LVGL configuration.

main/ui/apps/iotdis/bridge/bridge.h

@@ -0,0 +1,67 @@
+#pragma once
+
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "ui/apps/iotdis/settings/settings_handler.h"
+#include <string>
+#include <cstdint>
+#include <memory>
+#include "esp_err.h"
+#include "network/udp_client.h"
+
+struct StatusUpdateEventData {
+  enum class VoiceState {
+    UNKNOWN,
+    MUTED,
+    UNMUTED,
+    ERROR
+  } state;
+};
+
+using StatusEventCallback = void(*)(StatusUpdateEventData, void*);
+
+
+class IotDisBridge {
+public:
+  IotDisBridge(
+    SettingHandler* setting_handler
+  ) : setting_handler_(setting_handler) { }
+  ~IotDisBridge();
+
+  void start_polling_task();
+  void stop_polling_task();
+
+  esp_err_t send_mute_command();
+  bool test_connection(const std::string& ip, uint16_t port) {
+    return test_connection(ip, port, setting_handler_->get_local_port());
+  }
+  bool test_connection(const std::string& ip, uint16_t port, uint16_t local_port);
+  void register_on_status_update_callback(
+    StatusEventCallback callback,
+    void* status_event_user_data
+  ) {
+    on_status_update_callback_ = callback;
+    status_event_user_data_ = status_event_user_data;
+  }
+
+private:
+  static constexpr int POLL_INTERVAL_MS = 2000;
+  static constexpr int ERROR_POLL_INTERVAL_MS = 5000;
+  static constexpr int RESPONSE_TIMEOUT_MS = 1000;
+  static constexpr int MAX_FAILURES_BEFORE_ERROR = 3;
+
+  void poll_status_();
+
+  // Polling task
+  static void poll_task_(void* param);
+
+  TaskHandle_t poll_task_handle_ = nullptr;
+  bool stop_polling_ = false;
+  int consecutive_failures_ = 0;
+  SettingHandler* setting_handler_ = nullptr;
+  UDPClient udp_client_;
+
+  StatusEventCallback on_status_update_callback_ = nullptr;
+  void* status_event_user_data_ = nullptr;
+
+};