feat: Add `prefer_barrel_import`

[metaspook]

Description

This would be very helpful if there's a lint rule that tells to import barrel file instead of direct or individual file if there's any barrel available in the importing directory. my dev team juniors mostly make this mistake..
Thanks in advance 👍

Requirements

• All CI/CD checks are passing.
• There is no drop in the test coverage percentage.

Additional Context

• If directory mobile_app/modules/dashboard/ contains a barrel file e.g. dashboard.dart
  // Good
  import 'package:mobile_app/modules/dashboard/dashboard.dart';
  // Bad
  import 'package:mobile_app/modules/dashboard/view/dashboard_view.dart';

[omartinma]

Hi @metaspook,

First of all, thank you for opening an issue in the repository!

Unfortunately, your request is outside the scope of Very Good Analysis, as we do not provide support for custom lint rules. If you’d like to propose a new lint rule, we recommend creating a new issue in the Dart repository, assuming one doesn’t already exist.

Thanks again!