Change QR lib

[Gerifield]

Change the QR gen. lib to https://github.com/yeqown/go-qrcode
Which has a broader feature support, like adding an image to the code.

[Gerifield]

As an option the AFR logo could be added: https://www.mnb.hu/letoltes/mnb-afr-qvik-brandbook-2024.pdf

[Gerifield]

The lib needs to be able to do encoding supporting segments/variable encoding.
The string content contains line feeds which do not count as alphanumeric so by default the encoding will be binary, but that results in a version 14 (a bit bigger) QR code, not the standard ver. 13 as it should be, for the max. allowed content size.

With variable/segment encoding the QR size should be smaller and should fit in the ver. 13.
(But I highlty doubt the applications do validations on this.)

[Gerifield]

https://github.com/piglig/go-qr/ supports segments