[flutter_local_notifications] How about using Named Parameters for some functions?

[TaeBbong]

Hi @MaikuB ! I've used this package for my projects, and I'm really appreciate about this nice package.

I have some enhancement points;

• Using Named Parameters for functions in lib/src/flutter_local_notifications_plugin.dart
  Functions we use such as zonedSchedule() or periodicallyShow() provides positional parameters like:

Future<void> zonedSchedule(
    int id,
    String? title,
    String? body,
    TZDateTime scheduledDate,
    NotificationDetails notificationDetails, {
    required AndroidScheduleMode androidScheduleMode,
    String? payload,
    DateTimeComponents? matchDateTimeComponents,
  })

When we use this, we sometimes get confused about which order to put parameters in it.
So I suggest named parameters like:

Future<void> periodicallyShow({
  required int id,
  String? title,
  String? body,
  required RepeatInterval repeatInterval,
  required NotificationDetails notificationDetails,
  required AndroidScheduleMode androidScheduleMode,
  String? payload,
});

If you think this would work well, I would like to get on this work then make pull request.