Restructure repository to include all source folders

Move git root from Client/ to src/ to track all source code:
- Client: Game client source (moved to Client/Client/)
- Server: Game server source
- GameTools: Development tools
- CryptoSource: Encryption utilities
- database: Database scripts
- Script: Game scripts
- rylCoder_16.02.2008_src: Legacy coder tools
- GMFont, Game: Additional resources

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Server/NFAuthTool/NFAuthServer/Nave/NFStringUtil.h

@@ -0,0 +1,24 @@
+/** 
+ *  @file		NFStringUtil.h
+ *  @brief		문자열 유틸리티 선언
+ *  @remarks	
+ *  @author		강동명(edith2580@gmail.com)
+ *  @date		2009-04-02
+ */
+
+#pragma once
+
+
+#include <windows.h>
+#include <mmsystem.h>
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <memory.h>
+#include <tchar.h>
+#include <stddef.h>		// 템플릿 라이브러리 헤더?
+#include <conio.h>
+
+#include "NFStringGenericConversion.h"
+#include "NFStringGeneral.h"
+#include "NFStringCompare.h"