R Markdown output format for the city of Zurich corporate design. A thin
wrapper around [indiedown_pdf_document_with_asset()] that fixes the syntax
highlighting style and the LaTeX engine (`xelatex`, required for the
bundled fonts).
Usage
zueridown(...)
Arguments
...
Passed on to [indiedown_pdf_document_with_asset()] and, in turn,
to [rmarkdown::pdf_document()].