weasy_pdf?

[Nitrodist]

Issue description

wkhtmltopdf is deprecated and unmaintained now. The alternatives listed on their website indicate two options:

• If you’re using it for report generation (i.e. with HTML you control), also consider using WeasyPrint or the commercial tool Prince – note that I’m not affiliated with either project, and do your diligence.

Let's move this code base to a weasy implementation - there is viable code available from the forked pdfkit here: https://github.com/gripapp/weasyprint that we can use as the backend replacement for the wkhtmltopdf binary calls.

Expected or desired behavior

Backend is reimplemented in weasy

[unixmonkey]

Please see: #1045