feat(elements): add pf-alert demo and test HTML files

Author: chubara62372

elements/pf-alert/demo/alternate.html elements/pf-alert/demo/pf-alert.htmlelements/pf-alert/demo/alternate.html renamed to elements/pf-alert/demo/pf-alert.html

@@ -60,4 +60,5 @@ <h3 slot="header">Caution</h3>
 <script type="module">
   import '@patternfly/elements/pf-alert/pf-alert.js';
   import '@patternfly/elements/pf-button/pf-button.js';
-</script>
+</script>
+//