Add KNX DALI Gateway Module and Message Queue Implementation

- Introduced KnxDaliModule class for handling DALI message queuing, commissioning, and KNX group-object dispatch.
- Implemented Message and MessageQueue classes for managing message operations.
- Removed obsolete OpenKNX IDF component files and CMake configurations.
- Updated submodule reference for KNX.

Signed-off-by: Tony <tonylu@tony-cloud.com>

components/gateway_knx/include/ets_device_runtime.h

@@ -0,0 +1,77 @@
+#pragma once
+
+#include "esp_idf_platform.h"
+#include "ets_memory_loader.h"
+
+#include "knx/bau07B0.h"
+#include "knx/cemi_frame.h"
+
+#include <cstddef>
+#include <cstdint>
+#include <functional>
+#include <string>
+#include <vector>
+
+namespace gateway::openknx {
+
+class EtsDeviceRuntime {
+ public:
+  using CemiFrameSender = std::function<void(const uint8_t* data, size_t len)>;
+  using GroupWriteHandler = std::function<void(uint16_t group_address, const uint8_t* data,
+                                               size_t len)>;
+  using FunctionPropertyHandler = std::function<bool(uint8_t object_index, uint8_t property_id,
+                                                     const uint8_t* data, size_t len,
+                                                     std::vector<uint8_t>* response)>;
+
+  EtsDeviceRuntime(std::string nvs_namespace,
+                   uint16_t fallback_individual_address,
+                   uint16_t tunnel_client_address = 0);
+  ~EtsDeviceRuntime();
+
+  uint16_t individualAddress() const;
+  uint16_t tunnelClientAddress() const;
+  bool configured() const;
+  bool programmingMode() const;
+  void setProgrammingMode(bool enabled);
+  void toggleProgrammingMode();
+  EtsMemorySnapshot snapshot() const;
+
+  void setFunctionPropertyHandlers(FunctionPropertyHandler command_handler,
+                                   FunctionPropertyHandler state_handler);
+  void setGroupWriteHandler(GroupWriteHandler handler);
+  void setNetworkInterface(esp_netif_t* netif);
+
+  bool handleTunnelFrame(const uint8_t* data, size_t len, CemiFrameSender sender);
+  bool handleBusFrame(const uint8_t* data, size_t len);
+  bool emitGroupValue(uint16_t group_object_number, const uint8_t* data, size_t len,
+                      CemiFrameSender sender);
+  void loop();
+
+ private:
+  static bool HandleOutboundCemiFrame(CemiFrame& frame, void* context);
+  static void EmitTunnelFrame(CemiFrame& frame, void* context);
+  static void HandleSecureGroupWrite(uint16_t group_address, const uint8_t* data,
+                                     uint8_t data_length, void* context);
+  static bool HandleFunctionPropertyCommand(uint8_t object_index, uint8_t property_id,
+                                            uint8_t length, uint8_t* data,
+                                            uint8_t* result_data, uint8_t& result_length);
+  static bool HandleFunctionPropertyState(uint8_t object_index, uint8_t property_id,
+                                          uint8_t length, uint8_t* data,
+                                          uint8_t* result_data, uint8_t& result_length);
+  static uint16_t DefaultTunnelClientAddress(uint16_t individual_address);
+  static bool DispatchFunctionProperty(FunctionPropertyHandler* handler, uint8_t object_index,
+                                       uint8_t property_id, uint8_t length, uint8_t* data,
+                                       uint8_t* result_data, uint8_t& result_length);
+  bool shouldConsumeTunnelFrame(CemiFrame& frame) const;
+  bool shouldConsumeBusFrame(CemiFrame& frame) const;
+
+  std::string nvs_namespace_;
+  EspIdfPlatform platform_;
+  Bau07B0 device_;
+  CemiFrameSender sender_;
+  GroupWriteHandler group_write_handler_;
+  FunctionPropertyHandler command_handler_;
+  FunctionPropertyHandler state_handler_;
+};
+
+}  // namespace gateway::openknx

components/gateway_knx/include/ets_memory_loader.h

@@ -0,0 +1,22 @@
+#pragma once
+
+#include <cstdint>
+#include <string>
+#include <vector>
+
+namespace gateway::openknx {
+
+struct EtsAssociation {
+  uint16_t group_address{0};
+  uint16_t group_object_number{0};
+};
+
+struct EtsMemorySnapshot {
+  bool configured{false};
+  uint16_t individual_address{0};
+  std::vector<EtsAssociation> associations;
+};
+
+EtsMemorySnapshot LoadEtsMemorySnapshot(const std::string& nvs_namespace);
+
+}  // namespace gateway::openknx

components/gateway_knx/include/gateway_knx_internal.h

@@ -0,0 +1,61 @@
+#pragma once
+
+// Internal header shared between gateway_knx.cpp and gateway_knx_router.cpp.
+
+#include "driver/uart.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/semphr.h"
+#include "soc/uart_periph.h"
+
+#include <cstdint>
+#include <string>
+
+namespace gateway {
+namespace knx_internal {
+
+constexpr const char* kTag = "gateway_knx";
+
+// RAII semaphore guard.
+class SemaphoreGuard {
+ public:
+  explicit SemaphoreGuard(SemaphoreHandle_t semaphore) : semaphore_(semaphore) {
+    if (semaphore_ != nullptr) {
+      xSemaphoreTake(semaphore_, portMAX_DELAY);
+      locked_ = true;
+    }
+  }
+  ~SemaphoreGuard() {
+    if (locked_) {
+      xSemaphoreGive(semaphore_);
+    }
+  }
+ private:
+  SemaphoreHandle_t semaphore_{nullptr};
+  bool locked_{false};
+};
+
+// Resolve a UART IO pin from config or SoC defaults.
+inline bool ResolveUartIoPin(uart_port_t uart_port, int configured_pin,
+                             uint32_t pin_index, int* resolved_pin) {
+  if (resolved_pin == nullptr) return false;
+  if (configured_pin >= 0) {
+    *resolved_pin = configured_pin;
+    return true;
+  }
+  if (uart_port < 0 || uart_port >= SOC_UART_NUM ||
+      pin_index >= SOC_UART_PINS_COUNT) {
+    *resolved_pin = UART_PIN_NO_CHANGE;
+    return false;
+  }
+  const int default_pin =
+      uart_periph_signal[uart_port].pins[pin_index].default_gpio;
+  if (default_pin < 0) {
+    *resolved_pin = UART_PIN_NO_CHANGE;
+    return false;
+  }
+  *resolved_pin = default_pin;
+  return true;
+}
+
+}  // namespace knx_internal
+}  // namespace gateway