add cards to tests page

Author: Amber Febbraro

src/pages/tests/cards.hbs

@@ -12,6 +12,16 @@ layout: blank
     {{#embed "patterns.components.card.base"}}{{/embed}}
   </div>
 
+  <div class="drizzle-o-ContentGrouping">
+    <h2 class="drizzle-b-h2">Standout</h2>
+    {{#embed "patterns.components.card.standout"}}{{/embed}}
+  </div>
+
+  <div class="drizzle-o-ContentGrouping">
+    <h2 class="drizzle-b-h2">Highlighted Header</h2>
+    {{#embed "patterns.components.card.header"}}{{/embed}}
+  </div>
+
   <div class="drizzle-o-ContentGrouping">
     <h2 class="drizzle-b-h2">Sample Card</h2>
     {{#embed "patterns.components.card.base"