Can we have a nicer way to add click listener for annotations?

Nobody has claimed this yet.

1. Instead of straight up doing the java way, implementing abstract classes for listener for annotations, why don't just use lambda since dart already supported much shorter syntax? Why would it have to be extra mile?
2. It should be able to setup click listener on the annotation class itself. For example:
It can be like this
```dart
final annotation = await circleAnnotationManager?.create(
CircleAnnotationOptions(
geometry: coordinate.toPoint().toJson(),
circleRadius: 10,
circleColor: Colors.orange.value,
),
);
annotation.setClickListener(() {
//...
})
```
or like this:
```dart
final annotation = await circleAnnotationManager?.create(
CircleAnnotationOptions(
geometry: coordinate.toPoint().toJson(),
circleRadius: 10,
circleColor: Colors.orange.value,
onClick: () {}
),
);
annotation.setClickListener(() {
//...
})
```
This way it would be much nicer.

Start by tracing the CircleAnnotationManager, CircleAnnotationOptions, and annotation objects used in the examples. Compare the existing annotation click-listener API with the requested callback forms, then define completion as supporting a simpler click callback on the created annotation or its options with appropriate behavior for CircleAnnotation.

Written by the indexing model from the issue text.