Generate `Enum` classes

[hakobyansen]

Generate Enum classes (supported since PHP 8.1 version).

An example of the command to generate an Enum class:

vendor/bin/phpdto enum --class MyEnum --fields Active, Inactive, Blocked --namespace App\Enums

The command above should generate the following class:

namespace App\Enums;

enum Status
{
    case ACTIVE;
    case INACTIVE;
    case BLOCKED;
}