[8.x] Allow model attributes to be casted to/from an Enum

[themsaid]

This allows casting Eloquent model attributes to enums:

public $casts = [
    'status' => ServerStatus::class,
];

Then people can do:

if ($server->status == ServerStatus::provisioned){
    // ...
}

[ankurk91]

Note :

This feature requires php 8.1