Initial commit: ROW Client source code

Game client codebase including:
- CharacterActionControl: Character and creature management
- GlobalScript: Network, items, skills, quests, utilities
- RYLClient: Main client application with GUI and event handlers
- Engine: 3D rendering engine (RYLGL)
- MemoryManager: Custom memory allocation
- Library: Third-party dependencies (DirectX, boost, etc.)
- Tools: Development utilities

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

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

Tools/PatchCommon/Patch_Util.cpp

@@ -0,0 +1,49 @@
+#pragma once
+
+#include "Patch_Util.h"
+
+
+DWORD GetFileSize( const char* szFileName )
+{
+	HANDLE hFile = CreateFile( szFileName, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE,
+						  NULL, OPEN_EXISTING, 0, 0 );
+	if( INVALID_HANDLE_VALUE == hFile )
+	{
+		return 0;
+	}
+
+	DWORD dwFileSize = GetFileSize ( hFile, NULL );
+	CloseHandle( hFile );
+
+	return dwFileSize;
+}
+
+bool IsFileExist( const char* szFileName )
+{
+	HANDLE hFile = CreateFile( szFileName, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE,
+						  NULL, OPEN_EXISTING, 0, 0 );
+	if( INVALID_HANDLE_VALUE == hFile )
+	{
+		return false;
+	}
+
+	CloseHandle( hFile );
+	return true;
+}
+
+bool IsDirectoryExist( const char* szDirName )
+{
+	DWORD dwAttr = GetFileAttributes( szDirName );
+
+	if( INVALID_FILE_ATTRIBUTES == dwAttr )
+	{
+		return false;
+	}
+
+	if( FILE_ATTRIBUTE_DIRECTORY & dwAttr )
+	{
+		return true;
+	}
+
+	return false;
+}