[core] Support geo-navigation URL

Signed-off-by: x7z4w <x7z4w@noreply.codeberg.org>

libs/platform/preferred_languages.cpp

@@ -579,6 +579,11 @@ std::string GetCurrentMapLanguage()
   return languageCode;
 }
 
+std::string GetMostPreferredLang()
+{
+  return std::string(StringUtf8Multilang::GetLangByCode(GetPreferredLangIndexes()[0]));
+}
+
 std::vector<int8_t> GetPreferredLangIndexes()
 {
   std::vector<int8_t> langs = {};