layout: restructure into src/ tests/ android/ scripts/ tools/

- extension/src/{port,platform,codepage} -> src/; native_render -> src/host
  (+ dxt, shaders/); libgr2 -> src/gr2; extension/third_party -> third_party
- extension/tests -> tests/port, libgr2/tests -> tests/gr2
- android-native -> android (build.sh, push-client.sh moved in)
- script -> scripts; tools/40250 -> tools/server; oracle -> tools/granny-oracle;
  perf tools -> tools/perf
- all build trees under build/ (native, release, android, port-gate)
- xrender:: CMake aliases -> mt::; port-map ledger impl paths rewritten

No code changes. ctest 15/15, port_gate macos+android PASS, port_map check 0 errors.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/port/EterGrnLib/Thing.h

@@ -0,0 +1,49 @@
+#pragma once
+
+#include "Model.h"
+#include "Motion.h"
+
+class CGraphicThing : public CResource
+{
+	public:
+		typedef CRef<CGraphicThing> TRef;
+
+	public:
+		static CGraphicThing::TType Type();
+
+	public:
+		CGraphicThing(const char * c_szFileName);
+		virtual ~CGraphicThing();
+
+		virtual bool			CreateDeviceObjects();
+		virtual void			DestroyDeviceObjects();
+
+		bool					CheckModelIndex(int iModel) const;
+		CGrannyModel *			GetModelPointer(int iModel);
+		int						GetModelCount() const;
+
+		bool					CheckMotionIndex(int iMotion) const;
+		CGrannyMotion *			GetMotionPointer(int iMotion);
+		int						GetMotionCount() const;
+
+	protected:
+		void					Initialize();
+
+		bool					LoadModels();
+		bool					LoadMotions();
+
+	protected:
+		bool					OnLoad(int iSize, const void* c_pvBuf);
+		void					OnClear();
+		bool					OnIsEmpty() const;
+		bool					OnIsType(TType type);
+
+	protected:
+		granny_file *			m_pgrnFile;
+		granny_file_info *		m_pgrnFileInfo;
+
+		granny_animation *		m_pgrnAni;
+
+		CGrannyModel *			m_models;
+		CGrannyMotion *			m_motions;
+};