[12.x] Improve db:seed command output formatting and add database connection name with -v option

[amirhshokri]

This PR continues the work started in #56310, improving php artisan db:seed command output when using seeders, and adds the ability to show the database connection name next to each seeder when the -v flag is provided.

Problem

When running php artisan db:seed command, if DatabaseSeeder.php calls multiple seeders using $this->call(), the output becomes difficult to follow. Specifically, the RUNNING and DONE lines from seeders appear in the middle of the Database\Seeders\DatabaseSeeder progress line:

Example (current behavior):

class DatabaseSeeder extends Seeder
{
    /**
     * Seed the application's database.
     *
     * @return void
     */
    public function run()
    {
        $this->call([
            TestSeeder::class,
            TestSeeder2::class,
        ]);
    }
}

INFO  Seeding database.

  Database\Seeders\DatabaseSeeder   Database\Seeders\TestSeeder .......................................................... RUNNING
  Database\Seeders\TestSeeder .......................................................... 0 ms DONE
  Database\Seeders\TestSeeder2 .......................................................... RUNNING
  Database\Seeders\TestSeeder2 .......................................................... 0 ms DONE
.................................................................................................. 3.12ms DONE

Solution

• Adjust SeedCommand.php so that output lines for seeders are clearly separated.
• Ensure each seeder's RUNNING and DONE messages wrap its own execution.
• Add display of the database connection name next to the seeder class when running with -v mode.

Example (improved behavior):

INFO  Seeding database.

  Database\Seeders\DatabaseSeeder .................................................................. RUNNING

  Database\Seeders\TestSeeder ...................................................................... RUNNING
  Database\Seeders\TestSeeder ...................................................................... 0 ms DONE

  Database\Seeders\TestSeeder2 ..................................................................... RUNNING
  Database\Seeders\TestSeeder2 ..................................................................... 0 ms DONE

  Database\Seeders\DatabaseSeeder .................................................................. 5 ms DONE

With -v flag:

INFO  Seeding database.

  Database\Seeders\DatabaseSeeder mysql ............................................................ RUNNING

  Database\Seeders\TestSeeder ...................................................................... RUNNING
  Database\Seeders\TestSeeder ...................................................................... 0 ms DONE

  Database\Seeders\TestSeeder2 ..................................................................... RUNNING
  Database\Seeders\TestSeeder2 ..................................................................... 0 ms DONE

  Database\Seeders\DatabaseSeeder mysql .......................................................... 4 ms DONE

Benefits:

• Cleaner CLI output for developers running seeders.
• Easier debugging and monitoring of which seeders ran and on which connection (especially useful in multi-database environments).

[taylorotwell]

I don't want to overcook this. I don't know if there is a ton of demand.