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_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