Fix #2283 - Create new cart after checkout

[grimasod]

Related issues

#2283

Short description and why it's useful

With Direct Backend Sync enabled, create a logged-in customer cart (if the user is logged in) after completing an order. A guest cart is no longer necessary.

Screenshots of visual changes before/after (if there are any)

Screenshot of passed e2e tests (if you are using our standard setup as a backend)

Upgrade Notes and Changelog

• No upgrade steps required (100% backward compatibility)

Contribution and currently important rules acceptance

• I read and followed contribution rules
• I read the TypeScript Action Plan and adjusted my PR according to it
• I read about Vue Storefront Modules and I am aware that every new feature should be a module

[patzick]

Thanks! :)
Please update also a Changelog

[grimasod]

Sure :)
Like this?

[patzick]

Yup, thanks!