port 2A step 2: copy the 40250 header closure into the port mirror

76 closure headers (EterBase, EterLocale, EterPack, EterLib, GameLib, MilesLib,
EffectLib, SphereLib, EterImageLib) copied by the new port_copy.py (CP949->UTF-8,
LF, include-path case only); platform-class headers go to the mirror path too, as
the interface platform/ implements. Six manual `// PORT:` edits (Random, Singleton,
Pool, Stl, Utils, FlyTarget).

- common/D3D8Types.h: D3D8 value types with SDK values/layout, opaque COM interfaces
- common/shim/sdk (d3d8/d3dx8/mss) on every platform, common/shim/win32 off Windows
- Win32Types/Win32Crt: HRESULT, GUID, LARGE_INTEGER, LOGFONT/TEXTMETRIC, _atoi64,
  CRITICAL_SECTION on std::recursive_mutex
- header gate prepends each library's StdAfx.h (40250's precompiled header)

port_gate: macOS, Android, iOS, Windows (mingw) PASS; Linux BLOCKED (no toolchain).
ScriptLib/EterPythonLib/UserInterface wait for 2P (their StdAfx includes Python).

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

extension/src/port/EterPack/StdAfx.h

@@ -0,0 +1,9 @@
+#pragma once
+
+#define WIN32_LEAN_AND_MEAN		// Exclude rarely-used stuff from Windows headers
+
+//#include <crtdbg.h>
+#include <windows.h>
+#include <assert.h>
+
+#include "../EterBase/StdAfx.h"

extension/src/port/EterPack/md5.h

@@ -0,0 +1,128 @@
+#ifndef __INC_ETERPACKLIB_MD5_H__
+#define __INC_ETERPACKLIB_MD5_H__
+
+/*
+
+ ***********************************************************************
+
+ ** md5.h -- header file for implementation of MD5                    **
+
+ ** RSA Data Security, Inc. MD5 Message-Digest Algorithm              **
+
+ ** Created: 2/17/90 RLR                                              **
+
+ ** Revised: 12/27/90 SRD,AJ,BSK,JT Reference C version               **
+
+ ** Revised (for MD5): RLR 4/27/91                                    **
+
+ **   -- G modified to have y&~z instead of y&z                       **
+
+ **   -- FF, GG, HH modified to add in last register done             **
+
+ **   -- Access pattern: round 2 works mod 5, round 3 works mod 3     **
+
+ **   -- distinct additive constant for each step                     **
+
+ **   -- round 4 added, working mod 7                                 **
+
+ ***********************************************************************
+
+ */
+
+/*
+
+ ***********************************************************************
+
+ ** Copyright (C) 1990, RSA Data Security, Inc. All rights reserved.  **
+
+ **                                                                   **
+
+ ** License to copy and use this software is granted provided that    **
+
+ ** it is identified as the "RSA Data Security, Inc. MD5 Message-     **
+
+ ** Digest Algorithm" in all material mentioning or referencing this  **
+
+ ** software or this function.                                        **
+
+ **                                                                   **
+
+ ** License is also granted to make and use derivative works          **
+
+ ** provided that such works are identified as "derived from the RSA  **
+
+ ** Data Security, Inc. MD5 Message-Digest Algorithm" in all          **
+
+ ** material mentioning or referencing the derived work.              **
+
+ **                                                                   **
+
+ ** RSA Data Security, Inc. makes no representations concerning       **
+
+ ** either the merchantability of this software or the suitability    **
+
+ ** of this software for any particular purpose.  It is provided "as  **
+
+ ** is" without express or implied warranty of any kind.              **
+
+ **                                                                   **
+
+ ** These notices must be retained in any copies of any part of this  **
+
+ ** documentation and/or software.                                    **
+
+ ***********************************************************************
+
+ */
+
+ 
+
+/* typedef a 32-bit type */
+
+typedef unsigned long int UINT4;
+
+ 
+
+/* Data structure for MD5 (Message-Digest) computation */
+
+typedef struct {
+
+  UINT4 i[2];                   /* number of _bits_ handled mod 2^64 */
+
+  UINT4 buf[4];                                    /* scratch buffer */
+
+  unsigned char in[64];                              /* input buffer */
+
+  unsigned char digest[16];     /* actual digest after MD5Final call */
+
+} MD5_CTX;
+
+ 
+#if defined (__cplusplus)
+extern "C" {
+#endif
+
+void MD5Init (MD5_CTX *);
+
+void MD5Update (MD5_CTX *,unsigned char *,unsigned int);
+
+void MD5Final (MD5_CTX *);
+
+void MD5Transform(UINT4 *,UINT4 *);
+
+#if defined (__cplusplus)
+};
+#endif
+
+/*
+
+ ***********************************************************************
+
+ ** End of md5.h                                                      **
+
+ ******************************** (cut) ********************************
+
+ */
+
+
+#endif