Scala wrapper around wkhtmltopdf that generates PDFs from HTML/CSS/JS: accepts input as files, streams, URLs, Scala XML elements, or raw strings; writes to files or output streams; supports wkhtmltopdf's extended parameters (orientation, page size, margins); referenced images/stylesheets; async conversion via Scala `Future`; and a `WrappedPdf` mode for headless environments (e.g. via xvfb-run).