LibUnicode: Add public accessors to generated locale data

Author: https://github.com/trflynn89
Commit: 137e98cb6f
Pull-request: https://github.com/SerenityOS/serenity/pull/9599
Reviewed-by: https://github.com/alimpfard
Reviewed-by: https://github.com/davidot
Reviewed-by: https://github.com/linusg ✅

Userland/Libraries/LibUnicode/Locale.h

@@ -37,4 +37,9 @@ Optional<LanguageID> parse_unicode_language_id(StringView);
 Optional<LocaleID> parse_unicode_locale_id(StringView);
 Optional<String> canonicalize_unicode_locale_id(LocaleID&);
 
+String const& default_locale();
+bool is_locale_available(StringView locale);
+
+Optional<StringView> get_locale_territory_mapping(StringView locale, StringView code);
+
 }