2V0-g: port the .fnt font pipeline over a FreeType GDI emulation

CGraphicText, CGraphicFontTexture and CGraphicDib are the 40250 bodies
verbatim; CGraphicTextInstance is verbatim except that its D3D draws become
UI render commands (one image quad per glyph, Bar for cursor/underline).

- platform/Win32Gdi.cpp: the GDI subset those files call, over vendored
  FreeType 2.13.3, following GDI's LOGFONT cell height, win metrics and gasp
  rules; system font lookup with substitute and CJK fallback faces
- Win32Crt: MultiByteToWideChar / WideCharToMultiByte (UTF-8 and 1252 by
  hand, other code pages through iconv)
- CGraphicImageTexture memory textures: glyph pages reach Godot as
  "mem:<id>@<revision>"; Metin2PythonHost.memory_texture + Canvas cache
- Util.cpp code page / font face table, SetDefaultCodePage at boot,
  DefaultFont_* block, fnt resource type, GetMaxTextureWidth/Height
- TextTag, StringCodec, Arabic, Vietnamese copied from 40250
- tests: port.text (Tahoma 12 metrics, alignment, CP949), port.app_loop
  and python_host_test.gd now check glyph quads instead of text commands

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

extension/src/platform/ScriptLib/PythonBoot.cpp

@@ -6,6 +6,7 @@
 #include "UserInterface/StdAfx.h" // initpack and the rest of the module initializer list
 #include "EterPythonLib/StdAfx.h"
 #include "EterBase/Timer.h"
+#include "EterLib/Util.h"
 #include "PythonBoot.h"
 #include "PythonHost.h"
 #include "../EterLib/UIRenderCommands.h"
@@ -176,6 +177,10 @@ bool Start(const char* stdlib_path, std::string* error)
 	if (g_launcher)
 		return true;
 
+	// 40250 Main (UserInterface.cpp:410): if (LocaleService_LoadGlobal(hInstance)) SetDefaultCodePage(...).
+	// PORT: the platform LocaleService is already the supplied locale.cfg (en, code page 1252).
+	SetDefaultCodePage(LocaleService_GetCodePage());
+
 	const std::string stdlib = (stdlib_path && *stdlib_path) ? stdlib_path : PythonHost::DefaultStdLibPath();
 	if (stdlib.empty())
 		return fail(error, "no Python standard library path (Metin2Python.stdlib_path / $MT_PYTHON_STDLIB)");