feat(windows64): add all 23 localisation blocks to languages.loc

Windows64 previously only had 10 language blocks (en-US, de-DE, es-ES,
fr-FR, it-IT, ja-JP, ko-KR, pt-BR, zh-CHT, ru-RU). All other languages
in UIScene_LanguageSelector fell back to English.

Added the 13 missing language blocks by mapping Durango/other-platform
XML source files to Windows64 integer IDs from strings.h:

  pt-PT  Portuguese (Portugal)
  da-DK  Danish
  fi-FI  Finnish
  nl-NL  Dutch
  pl-PL  Polish
  sv-SE  Swedish
  nb-NO  Norwegian
  sk-SK  Slovak
  cs-CZ  Czech
  el-GR  Greek
  zh-CN  Simplified Chinese
  es-MX  Spanish (Latin America)
  en-GB  English (UK, used as Greek fallback)

Each block contains 2288 strings with correct Slovak/Czech language name
translations, and English fallback for Windows64-specific strings not
present in Durango source files (coverage 83-98% per language).

Also enable eFont_SimpChinese for _WINDOWS64 in getFontForLanguage()
so Simplified Chinese uses MSYH.ttf (already present in Common/Media/font/CHS/)
instead of falling back to the bitmap font which cannot render CJK glyphs.

Minecraft.Client/Common/UI/UIController.cpp

@@ -345,7 +345,7 @@ UIController::EFont UIController::getFontForLanguage(int language)
 	switch(language)
 	{
 	case XC_LANGUAGE_JAPANESE:	return eFont_Japanese;
-#ifdef _DURANGO
+#if defined(_DURANGO) || defined(_WINDOWS64)
 	case XC_LANGUAGE_SCHINESE:	return eFont_SimpChinese;
 #endif
 	case XC_LANGUAGE_TCHINESE:	return eFont_TradChinese;