Closes#11420.
When using `--syntax-highlighting=idiomatic` with reveal.js output,
pandoc now generates HTML compatible with reveal.js's built-in
highlight.js plugin:
- Code blocks use `<pre><code class="language-X">` format
- The template loads highlight.js CSS, JS, and RevealHighlight plugin
- Theme defaults to "monokai", configurable via `highlightjs-theme`
variable
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>