1、实现目录读取功能

include/util/icu_raii.hpp

@@ -0,0 +1,22 @@
+//
+// Created by Shell on 2026-04-13.
+//
+
+#ifndef FORCAST_API_ICU_RAII_H
+#define FORCAST_API_ICU_RAII_H
+#include <unicode/ucsdet.h>
+
+struct UCharsetDetectorDeleter final
+{
+    void operator ()(UCharsetDetector* ptr) const
+    {
+        if (ptr)
+        {
+            ucsdet_close(ptr);
+        }
+    }
+};
+
+using UCharsetDetectorPtr = std::unique_ptr<UCharsetDetector, UCharsetDetectorDeleter>;
+
+#endif //FORCAST_API_ICU_RAII_H