updated folder scanning code

src/client_backend/check_dir.h

@@ -0,0 +1,11 @@
+#pragma once
+#ifndef CHECK_DIR_H
+#define CHECK_DIR_H
+#include <stdio.h>
+#include <iostream>
+#include <Windows.h>
+#include <chrono>
+#include <algorithm> // for std::transform
+void folder_scanner();
+#endif // !CHECK_DIR_H
+