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>

Engine/Zalla3D Scene Class/BillboardParticle.h

@@ -0,0 +1,23 @@
+// BillboardParticle.h: interface for the CBillboardParticle class.
+//
+//////////////////////////////////////////////////////////////////////
+
+#if !defined(AFX_BILLBOARDPARTICLE_H__76021856_2A4A_4818_B687_CC374D0D028D__INCLUDED_)
+#define AFX_BILLBOARDPARTICLE_H__76021856_2A4A_4818_B687_CC374D0D028D__INCLUDED_
+
+#if _MSC_VER > 1000
+#pragma once
+#endif // _MSC_VER > 1000
+#include "Particle.h"
+
+class CBillboardParticle  : public CParticle
+{
+	vector3 m_vecPos;	
+public:
+	void Create(vector3 vecPos);
+	CBillboardParticle();
+	virtual ~CBillboardParticle();
+
+};
+
+#endif // !defined(AFX_BILLBOARDPARTICLE_H__76021856_2A4A_4818_B687_CC374D0D028D__INCLUDED_)