Move DListItem.astro to components/ui folder

src/components/widgets/DListItem.astro

@@ -1,23 +0,0 @@
----
-// component: DListItem
-//
-// Mimics the html '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}/>