Userland: Move files destined for LibLocale to the Locale namespace

Author: https://github.com/trflynn89
Commit: ff48220dca
Pull-request: https://github.com/SerenityOS/serenity/pull/15096
Reviewed-by: https://github.com/linusg ✅

Userland/Libraries/LibJS/Runtime/Intl/DurationFormatConstructor.cpp

@@ -67,7 +67,7 @@ ThrowCompletionOr<Object*> DurationFormatConstructor::construct(FunctionObject&
     // 7. If numberingSystem is not undefined, then
     if (!numbering_system.is_undefined()) {
         // a. If numberingSystem does not match the Unicode Locale Identifier type nonterminal, throw a RangeError exception.
-        if (!Unicode::is_type_identifier(numbering_system.as_string().string()))
+        if (!::Locale::is_type_identifier(numbering_system.as_string().string()))
             return vm.throw_completion<RangeError>(ErrorType::OptionIsNotValidValue, numbering_system, "numberingSystem"sv);
     }