add: figure plugin

prepends/quote.typ

@@ -0,0 +1,15 @@
+// Typst version 14.0.2 outputs a block quote as a <blockquote> followed by
+// a <p> for the attribution.  This makes it difficult to target the
+// attribution for styling.  This snippet instead uses a <blockquote> and
+// a <figcaption> wrapped in a <figure> block.
+#show quote.where(block: true): it => {
+  let inner = html.elem("blockquote", it.body)
+  if it.attribution != none {
+    html.elem("figure", {
+      inner
+      html.elem("figcaption", it.attribution)
+    })
+  } else {
+    inner
+  }
+}