Implement DALI Bridge Engine and Model Management

- Added `bridge.cpp` to handle DALI bridge operations including model management, command execution, and response formatting.
- Introduced `bridge_model.cpp` for defining bridge models, value transformations, and JSON serialization/deserialization.
- Created `bridge_provisioning.cpp` for managing bridge configuration storage and retrieval using NVS on ESP platform.
- Enhanced `gateway_cloud.cpp` to integrate DALI bridge requests and responses with cloud communication.
- Introduced `modbus_bridge.cpp` to handle Modbus-specific operations and register management.
- Implemented utility functions for converting between DaliValue and cJSON formats.
- Added error handling and metadata management in bridge responses.

include/bridge_provisioning.hpp

@@ -0,0 +1,40 @@
+#pragma once
+
+#include "bacnet_bridge.hpp"
+#include "bridge_model.hpp"
+#include "modbus_bridge.hpp"
+
+#include <optional>
+#include <string>
+#include <vector>
+
+#ifdef ESP_PLATFORM
+extern "C" {
+#include "esp_err.h"
+}
+#else
+using esp_err_t = int;
+#endif
+
+struct BridgeRuntimeConfig {
+  std::vector<BridgeModel> models;
+  std::optional<ModbusBridgeConfig> modbus;
+  std::optional<BacnetBridgeConfig> bacnet;
+  DaliValue::Object metadata;
+
+  static BridgeRuntimeConfig fromJson(const DaliValue::Object& json);
+  DaliValue::Object toJson() const;
+};
+
+class BridgeProvisioningStore {
+ public:
+  explicit BridgeProvisioningStore(std::string nvsNamespace = "dali_bridge")
+      : nvsNamespace_(std::move(nvsNamespace)) {}
+
+  esp_err_t save(const BridgeRuntimeConfig& config) const;
+  esp_err_t load(BridgeRuntimeConfig* config) const;
+  esp_err_t clear() const;
+
+ private:
+  std::string nvsNamespace_;
+};