Initial tags support

lib/Atom.rakumod

@@ -41,6 +41,12 @@ sub post-to-item(BlogMeta:D $meta, Int:D $id, Post:D $post --> XML::Element) {
         XML::Element.new(:name<link>, :attribs({:href($link), :rel<alternate>}));
     $xml.append:
         XML::Element.new(:name<summary>, :nodes([$desc])) if $desc;
+    if $post.tags {
+        for $post.tags -> $tag {
+            $xml.append:
+                XML::Element.new(:name<category>, :attribs({:term($tag)}));
+        }
+    }
 
     $xml
 }