feat: Bestellprozess als Popup mit blättern und etc

ajax/frontend/order/saveCurrentStep.php

bin/frontend/controls/Ordering.js

bin/frontend/controls/order/Window.html

bin/frontend/controls/order/Window.js

locale.xml

src/QUI/ERP/Order/Controls/AbstractOrderingStep.php

src/QUI/ERP/Order/Controls/Address.php

src/QUI/ERP/Order/Controls/Basket.css

src/QUI/ERP/Order/Controls/Basket.php

src/QUI/ERP/Order/Controls/Checkout.php

src/QUI/ERP/Order/Controls/Delivery.php

src/QUI/ERP/Order/Controls/Finish.php

src/QUI/ERP/Order/Controls/Ordering.html

src/QUI/ERP/Order/Controls/Payment.php