prefer-correct-notifier-file-name
Suggests ending file names with _notifier.dart for files with Notifiers.
Example
❌ Bad:
some.dart
// LINT: File name of Notifier classes must end with '_notifier.dart'.
// Try renaming the file.
class SomeNotifier extends Notifier<int> {}
✅ Good:
some_notifier.dart
class SomeNotifier extends Notifier<int> {}