Add page numbers on the TOC

I believe it should be possible to do it in JavaScript once Paged.js process is completed using data-page-number attribute.

[djencks]

There’s now a “tutorial” how to do this: https://www.pagedjs.org/posts/2020-02-19-toc/

With our class names, this adds the page numbers:

.toc a::after,
.toc2 a::after {
  content: "p. " target-counter(attr(href), page);
  float: right;
}

I haven’t got Julie’s imitation leader to work yet.

[Mogztter]

Fixed in https://github.com/Mogztter/asciidoctor-web-pdf/pull/237, thanks @djencks 🎉