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/NFSingleton.h

@@ -0,0 +1,128 @@
+/** 
+ *  @file		NFSingleton.h
+ *  @brief		싱글톤 클래스
+ *  @remarks	
+ *  @author		강동명(edith2580@gmail.com)
+ *  @date		2009-04-02
+ */
+
+#pragma once
+
+#include <windows.h>
+#include <stdio.h>
+#include <assert.h>
+
+/*
+#include "NFSingleton.h"
+
+class Test : public Nave::NFSingleton<Test>
+{
+public:
+	Test()
+	{
+		printf("Test::Test()\n");
+	}
+	~Test()
+	{
+		printf("Test::~Test()\n");
+	}
+
+	int GetType()
+	{
+		return 0;
+	}
+};
+
+INT _tmain(INT argc, WCHAR* argv[])
+{
+	// 만약 싱글톤 객체를 사용하려면 
+	// 아래와 같이 사용하기 위해서 한번 New를 하고
+	Test* pTest = new Test;
+
+
+	// 다른 위치의 다른함수.
+	Test::GetInstance().GetType(); 와 같이 사용하면 된다.
+
+
+	delete pTest;
+}
+*/
+
+#pragma warning (disable : 4311)
+#pragma warning (disable : 4312)
+
+namespace Nave {
+
+	/** 
+	 *  @class        NFSingleton
+	 *  @brief        클래스 객체를 싱글톤으로 생성합니다.
+	 *  @remarks      
+	 *             
+	 *  @warning	  해당 싱글톤 객체는 처음 생성은 직접 new로 생성을 해주고	\r\n
+	 *				  delete가 될때까지 싱글톤 같이 사용하며 프로그램이 종료될때\r\n
+	 *				  delete를 해주면 된다.										
+	 *  @par          
+	 *  @author  Edith
+	 *  @date    2009-04-05
+	 */
+	template <typename T> class NFSingleton
+	{
+	
+	public:
+		/// NFSingleton 생성자
+		NFSingleton (void)
+		{
+			assert( !s_pSingleton && "NFSingleton : You can't create more"
+					" object, because this object is SINGLETON.");
+
+	#if defined( _MSC_VER ) && _MSC_VER < 1200	 
+			int iOffset = (int)(T*)1 - (int)(NFSingleton <T>*)(T*)1;
+			s_pSingleton = (T*)((int) this + iOffset);
+	#else
+			s_pSingleton = static_cast< T* >( this );
+	#endif
+		}
+
+		/// NFSingleton 소멸자
+		~NFSingleton (void)
+		{
+			assert( s_pSingleton && "NFSingleton : This object may be "
+					"destroyed by someone's memory control or other causes.");
+
+			s_pSingleton = 0;
+		}
+
+		/// 해당 싱글톤 객체가 생성되는지 확인한다.
+		static bool IsAlive()
+		{
+			return s_pSingleton ? true : false;
+		}
+
+		/// 싱글톤 객체의 인스턴스를 얻는다.
+		static T& GetInstance(void)
+		{
+			assert (s_pSingleton && "NFSingleton : Something is wrong."
+						" This object destroyed by something bad method or"
+						"you didn't create yet!");
+
+			return *s_pSingleton;
+		}
+
+		/// 싱글톤 객체의 유일한 인스턴스의 포인터를 얻는다
+		static T* GetInstancePtr(void)
+		{
+			assert (s_pSingleton && "NFSingleton : Something is wrong."
+						" This object destroyed by something bad method.");
+
+			return s_pSingleton;
+		}
+
+	private:
+		/// 싱글톤 객체를 담을 객체의 포인터
+		static T* s_pSingleton;
+	};
+
+	/// 싱글톤 객체 변수를 초기화 한다.
+	template<typename T> T* NFSingleton<T>::s_pSingleton = 0;
+
+}