Create basic redirect directory structure

[mcspronko]

The Pronko_LiqPayRedirect extension represents the LiqPay Checkout integration (see https://www.liqpay.ua/documentation/api/aquiring/checkout/ page) which redirects a customer to a LiqPay server with a payment form.

What should be included as part of this task:

see the checkout directory as an example:

• registration.php
• composer.json
• etc/module.xml

[underser]

working.