Test quarto vignette rendering

DESCRIPTION

@@ -58,6 +58,7 @@ Suggests:
     rstudioapi,
     rticles,
     rvest,
+    quarto,
     sass,
     testthat (>= 3.1.3),
     tools

NEWS.md

@@ -1,5 +1,6 @@
 # pkgdown (development version)
 
+* A new test vignette illustrates using quarto vignettes in pkgdown sites (#2210).
 * YAML validation has been substantially improved so you should get much clearer errors if you have made a mistake (#1927). Please file an issue if you find a case where the error message is not helpful.
 * `template_reference()` and `template_article()` now only add backticks to function names if needed (#2561).
 * Custom navbars that specify `icon` but not `aria-label` will now generate a message reminding you to provide one for to improve accessibility (#2533).

vignettes/test/quarto.qmd

@@ -0,0 +1,25 @@
+---
+title: "Quarto vignette"
+vignette: >
+  %\VignetteIndexEntry{Quarto vignette}
+  %\VignetteEngine{quarto::html}
+  %\VignetteEncoding{UTF-8}
+---
+
+Example of rendering a quarto vignette.
+
+## Figure numbers
+
+```{r, cross-ref}
+#| include: false
+set.seed(42)
+plot(rnorm(100))
+```
+
+See \@ref(fig:cross-ref) for a plot.
+
+## Figure cross-references
+
+![bacon](bacon.jpg){#fig-bacon}
+
+See @fig-bacon for an illustration.