What is the role of the packageServiceProvider file in Laravel 11

In Laravel 11, service providers are registered in the `bootstrap/providers.php` file, not in the `config/app.php` file as in previous versions of Laravel.

To add a service provider in Laravel 11:

1. Create a new service provider class using the Artisan command:

php artisan make:provider MyServiceProvider

This will create the `MyServiceProvider.php` file in the `app/Providers` directory.

2. Open the `bootstrap/providers.php` file and add your new service provider to the `providers` array:

php
'providers' => [
    // ...
    App\Providers\MyServiceProvider::class,
],

This will ensure your service provider is loaded and registered when your Laravel 11 application boots up.

There is no special "packageServiceProvider.php" file in Laravel 11. The standard approach is to create your custom service providers and register them in the `bootstrap/providers.php` file.