Add twint to qr bill

[Killabee]

It would be great to add twint (fields) and even ebill to qr bill.

[manuelbl]

The alternative methods are generic enough to add eBill and TWINT information today. Yet the library could profit from specific methods like it already does for Swico information.

Are you involved in a project with eBill and/or TWINT information and could help with testing? Issuing eBill capable invoices requires a registration with an eBill network partner. And for TWINT capable invoices, it is similar.