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/bacnet_bridge.hpp

@@ -0,0 +1,42 @@
+#pragma once
+
+#include "bridge.hpp"
+
+#include <cstdint>
+#include <optional>
+#include <string>
+#include <vector>
+
+struct BacnetBridgeConfig {
+  uint32_t deviceInstance = 4194303;
+  std::string localAddress;
+  uint16_t udpPort = 47808;
+};
+
+struct BacnetObjectBinding {
+  std::string modelID;
+  BridgeObjectType objectType = BridgeObjectType::unknown;
+  int objectInstance = -1;
+  std::string property;
+};
+
+class DaliBacnetBridge {
+ public:
+  explicit DaliBacnetBridge(DaliBridgeEngine& engine);
+
+  void setConfig(const BacnetBridgeConfig& config);
+  const BacnetBridgeConfig& config() const;
+
+  DaliBridgeResult handlePropertyWrite(BridgeObjectType objectType,
+                                       int objectInstance,
+                                       const std::string& property,
+                                       const DaliValue& value) const;
+  std::optional<BacnetObjectBinding> findObject(BridgeObjectType objectType,
+                                                int objectInstance,
+                                                const std::string& property) const;
+  std::vector<BacnetObjectBinding> describeObjects() const;
+
+ private:
+  DaliBridgeEngine& engine_;
+  BacnetBridgeConfig config_;
+};