Payment Gateway Integration, Checkout & Billing Templates Refactored

[shewa12]

ecommerce/PaymentGateways/Stripe Ignore checking Payment Hub dir

Payment gateway object creation way

$stripe = Tutor\Ecommerce::get_payment_gateway_object( StripeGateway::class );

To redirect user to the payment gateway

$stripe->setup_payment_and_redirect( $payment_data );