adding dropdown

themes/hextra/layouts/shortcodes/dropdown.html

@@ -0,0 +1,11 @@
+{{- $title := .Get "title" | default "" -}}
+{{- $closed := eq (.Get "closed") "true" | default false -}}
+
+<details class="last-of-type:mb-0 rounded-lg bg-neutral-50 dark:bg-neutral-800 p-2 mt-4 group" {{ if not $closed }}open{{ end }}>
+  <summary class="flex items-center cursor-pointer select-none list-none p-1 rounded transition-colors hover:bg-gray-100 dark:hover:bg-neutral-800 before:mr-1 before:inline-block before:transition-transform before:content-[''] dark:before:invert rtl:before:rotate-180 group-open:before:rotate-90">
+    <strong class="text-lg">{{ $title | markdownify }}</strong>
+  </summary>
+  <div class="p-2 overflow-hidden">
+    {{ .InnerDeindent | markdownify }}
+  </div>
+</details>