Generate enum variants factory methods with all common methods

[kunicmarko20]

From:

final class Version
{
    private const V1 = 'v1';

    private const V2 = 'v2';
}

to:

final class Version
{
    private const V1 = 'v1';

    private const V2 = 'v2';

    private const ALL_MAP = [
        self::V1,
        self::V2,
    ];

    /**
     * @var string
     */
    private $value;

    private function __construct(string $value)
    {
        Assert::that($value)->inArray(Self::ALL_MAP);

        $this->value = $value;
    }

    public static function fromString(string $value): self
    {
        return new self($value);
    }

    public static function v1(): self
    {
        return new self(self::V1);
    }

    public static function v2(): self
    {
        return new self(self::V2);
    }

    public function toString(): string
    {
        return $this->value;
    }

    public function equals(Enum $other): bool
    {
        return $this->value === $other->value;
    }
}