Add a library for QR Codes

For #40774 (closed) we need a library to draw QR codes.

Firefox already contains one in the developer tools, but it can draw QR codes up to "version 10", which is too restrictive for our purposes (version and error correction capability limit the length of the message contained in the QR code).

We should switch to another library.

For other details, please see comments in !254 (closed) (especially !254 (comment 2776615), !254 (comment 2776668), and !254 (comment 2776680)).