Adding documentation.

src/components/widgets/DListItem.astro

@@ -0,0 +1,23 @@
+---
+// component: DListItem
+//
+// Mimics the nroff/troff 'dl' (description list)
+//
+// The 'dt' item is the item 'term' and is inserted into an 'h6' tag.
+// Caller needs to style the 'h6' tag appropriately.
+//
+// You can put pretty much any content you want between the open and
+// closing tags - it's simply contained in an enclosing div with a
+// margin left.  No need for 'dd' items.
+//
+const {
+  dt
+} = Astro.props;
+interface Props {
+  dt:string
+}
+
+const content:string = await Astro.slots.render('default');
+---
+<h6 set:html={dt}></h6>
+<div class="dd ml-8" set:html={content}/>