[Feature] Convert Hyperlink to QR code for printing

[Earlesscat]

Dear Typora team,
I would like to request a function that give a QR code of the hyperlink in documents.
If the user wants to print documents, it will be difficult for the readers to access to URLs in printed version, if Typora can add a function that when enabled, if the user typed a hyperlink, typora will also generate a QR code for that hyperlink. And when the user update the hyperlink, typora can also update the QR code.
With this function, it will be much better for users who need to print Markdown documents with hyperlinks.