[3.x] allow modification of the personal team using an optional callable

[peterfox]

Changes

• User Factory in the database/factories folder, specifically the withPersonalTeam method, now has a callable parameter that will apply to the factory.

Why

Allows for modification of the withPersonalTeam method so that a callable can be passed to the method to modify the team factory further, for example:

User::factory()->withPersonalTeam(
  fn (TeamFactory $factory) => $factory
    ->state([
        'foo' => 'bar',
    ])
    ->has(
        Post::factory()
            ->count(10)
    )
)
->create();

I find myself wanting this out of the box when I use Jetstream, and others would appreciate the ability to do it without copying it to their project every time. Equally, it doesn't break any compatibility.