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/DecalFilters/DecalFilters.rc

@@ -0,0 +1,146 @@
+// Microsoft Visual C++ generated resource script.
+//
+#include "resource.h"
+#include "..\Include\DecalVersion.h"
+
+#define APSTUDIO_READONLY_SYMBOLS
+/////////////////////////////////////////////////////////////////////////////
+//
+// Generated from the TEXTINCLUDE 2 resource.
+//
+#include "winres.h"
+
+/////////////////////////////////////////////////////////////////////////////
+#undef APSTUDIO_READONLY_SYMBOLS
+
+/////////////////////////////////////////////////////////////////////////////
+// English (U.S.) resources
+
+#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU)
+#ifdef _WIN32
+LANGUAGE LANG_ENGLISH, SUBLANG_ENGLISH_US
+#pragma code_page(1252)
+#endif //_WIN32
+
+#ifdef APSTUDIO_INVOKED
+/////////////////////////////////////////////////////////////////////////////
+//
+// TEXTINCLUDE
+//
+
+1 TEXTINCLUDE 
+BEGIN
+    "resource.h\0"
+END
+
+2 TEXTINCLUDE 
+BEGIN
+    "#include ""winres.h""\r\n"
+    "\0"
+END
+
+3 TEXTINCLUDE 
+BEGIN
+    "1 TYPELIB ""DecalFilters.tlb""\r\n"
+    "\0"
+END
+
+#endif    // APSTUDIO_INVOKED
+
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// Version
+//
+
+VS_VERSION_INFO VERSIONINFO
+ FILEVERSION DECAL_MAJOR, DECAL_MINOR, DECAL_BUGFIX, DECAL_RELEASE
+ PRODUCTVERSION DECAL_MAJOR, DECAL_MINOR, DECAL_BUGFIX, DECAL_RELEASE
+ FILEFLAGSMASK 0x3fL
+#ifdef _DEBUG
+ FILEFLAGS 0x1L
+#else
+ FILEFLAGS 0x0L
+#endif
+ FILEOS 0x4L
+ FILETYPE 0x2L
+ FILESUBTYPE 0x0L
+BEGIN
+    BLOCK "StringFileInfo"
+    BEGIN
+        BLOCK "040904b0"
+        BEGIN
+            VALUE "Comments", "DecalFilters gives plug-in developers interfaces for monitoring client/server messages"
+            VALUE "FileDescription", "DecalFilters Module"
+            VALUE "FileVersion", DECAL_VERSION_STRING
+            VALUE "InternalName", "DecalFilters"
+            VALUE "LegalCopyright", "Copyright 2001"
+            VALUE "OriginalFilename", "DecalFilters.DLL"
+            VALUE "ProductName", "DecalFilters Module"
+            VALUE "ProductVersion", DECAL_VERSION_STRING
+        END
+    END
+    BLOCK "VarFileInfo"
+    BEGIN
+        VALUE "Translation", 0x409, 1200
+    END
+END
+
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// REGISTRY
+//
+
+IDR_WORLD               REGISTRY                "World.rgs"
+IDR_WORLDOBJECT         REGISTRY                "WorldObject.rgs"
+IDR_WORLDITERATOR       REGISTRY                "WorldIterator.rgs"
+IDR_IDENTIFYQUEUE       REGISTRY                "IdentifyQueue.rgs"
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// String Table
+//
+
+STRINGTABLE 
+BEGIN
+    IDS_PROJNAME            "DecalFilters"
+END
+
+#endif    // English (U.S.) resources
+/////////////////////////////////////////////////////////////////////////////
+
+
+/////////////////////////////////////////////////////////////////////////////
+// English (Canada) resources
+
+#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENC)
+#ifdef _WIN32
+LANGUAGE LANG_ENGLISH, SUBLANG_ENGLISH_CAN
+#pragma code_page(1252)
+#endif //_WIN32
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// REGISTRY
+//
+
+IDR_ECHOFILTER          REGISTRY                "EchoFilter.rgs"
+IDR_CHARACTERSTATS      REGISTRY                "CharacterStats.rgs"
+IDR_PREFILTER           REGISTRY                "Prefilter.rgs"
+IDR_ECHOFILTER2         REGISTRY                "EchoFilter2.rgs"
+#endif    // English (Canada) resources
+/////////////////////////////////////////////////////////////////////////////
+
+
+
+#ifndef APSTUDIO_INVOKED
+/////////////////////////////////////////////////////////////////////////////
+//
+// Generated from the TEXTINCLUDE 3 resource.
+//
+1 TYPELIB "DecalFilters.tlb"
+
+/////////////////////////////////////////////////////////////////////////////
+#endif    // not APSTUDIO_INVOKED
+