LibUnicode: Ignore U+200F when parsing format identifiers

Noticed this while implementing multiple identifier support. We were
errantly parsing U+200F as a lone identifier in some Hebrew formats.

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

@@ -93,7 +93,7 @@ struct UnicodeLocaleData {
 
 static String parse_identifiers(String pattern, StringView replacement, UnicodeLocaleData& locale_data, NumberFormat& format)
 {
-    static Utf8View whitespace { "\u0020\u00a0"sv };
+    static Utf8View whitespace { "\u0020\u00a0\u200f"sv };
 
     while (true) {
         Utf8View utf8_pattern { pattern };