LibUnicode: Generate a list of available numbering systems

Author: https://github.com/trflynn89
Commit: 481ced53d8
Pull-request: https://github.com/SerenityOS/serenity/pull/12223
Reviewed-by: https://github.com/linusg ✅

Meta/Lagom/Tools/CodeGenerators/LibUnicode/GenerateUnicodeNumberFormat.cpp

@@ -869,6 +869,8 @@ struct Unit {
 };
 )~~~");
 
+    generate_available_values(generator, "get_available_number_systems"sv, locale_data.number_systems);
+
     locale_data.unique_formats.generate(generator, "NumberFormatImpl"sv, "s_number_formats"sv, 10);
     locale_data.unique_format_lists.generate(generator, s_number_format_index_type, "s_number_format_lists"sv);
     locale_data.unique_symbols.generate(generator, s_string_index_type, "s_numeric_symbol_lists"sv);