feat: Add getOrder method for dynamic order column support.

[YazeedAlsaif]

feat: Add getOrder method for dynamic order column support.

• Implemented getOrder() method to fetch order values from dynamically determined columns.
• Added tests to validate the getOrder() functionality, ensuring it correctly handles different scenarios.
• Updated PHPDoc for getOrder() to clearly explain the method's behavior and dynamic column determination.

This update allows all models implementing this interface to use getOrder() to retrieve order values, simplifying code by abstracting the column name details.

Example:

$car = Car::first();
$user = User::find(2);

// instead of doing this
echo $car->order . PHP_EOL;
echo $user->order_column . PHP_EOL;

//we can do this:
echo $car->getOrder() . PHP_EOL;
echo $user->getOrder();

I hope you find this update useful.

Thank you for considering this contribution.

[freekmurze]

Thanks, but I'm going to pass on this for now. You can add such a function to your model in your own project.