StacAction class

Base class for all Stac actions that can be performed on widgets.

Actions represent user interactions or system events that can be triggered on Stac widgets. Each action type extends this base class and provides specific functionality through the actionType getter.

Example usage:

// Create a custom action
class CustomAction extends StacAction {
  const CustomAction({super.jsonData});

  @override
  String get actionType => 'custom';
}

// Parse from JSON
final action = StacAction.fromJson({'type': 'custom', 'data': 'value'});

JSON representation:

{
  "type": "action_type",
  "data": "action_specific_data"
}