Initial commit: Complete open-source Decal rebuild

All 5 phases of the open-source Decal rebuild:

Phase 1: 14 decompiled .NET projects (Interop.*, Adapter, FileService, DecalUtil)
Phase 2: 10 native DLLs rewritten as C# COM servers with matching GUIDs
  - DecalDat, DHS, SpellFilter, DecalInput, DecalNet, DecalFilters
  - Decal.Core, DecalControls, DecalRender, D3DService
Phase 3: C++ shims for Inject.DLL (D3D9 hooking) and LauncherHook.DLL
Phase 4: DenAgent WinForms tray application
Phase 5: WiX installer and build script

25 C# projects building with 0 errors.
Native C++ projects require VS 2022 + Windows SDK (x86).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Native/DecalControls/ListView.h

@@ -0,0 +1,65 @@
+// ListView.h : Declaration of the cListView
+
+#ifndef __LISTVIEW_H_
+#define __LISTVIEW_H_
+
+#include "resource.h"       // main symbols
+
+#include "SinkImpl.h"
+
+class cList;
+
+/////////////////////////////////////////////////////////////////////////////
+// cListView
+class ATL_NO_VTABLE cListView : 
+	public CComObjectRootEx<CComMultiThreadModel>,
+   public ILayerImpl< cListView >,
+   public ILayerRenderImpl,
+   public ILayerMouseImpl,
+   public cNoEventsImpl,
+	public IListView
+{
+public:
+	cListView();
+
+   CComPtr< ICanvas > m_pCache;
+
+   CComPtr< IImageCache > m_pBackground;
+
+	typedef std::map< std::pair< long, long >, long > cCellMap;
+	cCellMap m_cells;
+
+   long m_nRowHeight,
+      m_nRowCache,
+      m_nValidFrom,
+      m_nValidTo;
+
+   cList *m_pList;
+
+   void onCreate();
+   void onDestroy();
+
+BEGIN_COM_MAP(cListView)
+   COM_INTERFACE_ENTRY(ILayerRender)
+   COM_INTERFACE_ENTRY(ILayerMouse)
+   COM_INTERFACE_ENTRY(ILayer)
+	COM_INTERFACE_ENTRY(IListView)
+END_COM_MAP()
+
+public:
+	STDMETHOD(get_Color)(long nCol, long nRow, /*[out, retval]*/ long *pVal);
+	STDMETHOD(put_Color)(long nCol, long nRow, /*[in]*/ long newVal);
+   // IListView Methods
+	STDMETHOD(put_Area)(/*[in]*/ LPSIZE newVal);
+	STDMETHOD(SetCacheInfo)(long nRowHeight, long nRowsToCache);
+	STDMETHOD(InvalidateFrom)(long nRow);
+
+   // ILayerRender Methods
+   STDMETHOD(Reformat)();
+   STDMETHOD(Render)(ICanvas *pCanvas);
+
+   // ILayerMouse Methods
+   STDMETHOD(MouseDown)(MouseState *pMS);
+};
+
+#endif //__LISTVIEW_H_