feat: Update composeMail function

- Move function to hippie functions
- Use vanilla instead of jQuery
- Add examples to introduction page
- Reindent

source/screens/demo/introduction.njk

@@ -26,6 +26,8 @@ tags:
     </header>
     <article>
       <p>&hellip;</p>
+      <p>Contact: <a id="special" href=""></a></p>
+      <p>More: <a class="general" href=""></a>, <a class="general" href=""></a></p>
     </article>
   </section>
 {% endblock %}
@@ -43,6 +45,8 @@ tags:
 
     $(document).ready(function () {
       logPerf('JQ document ready event fired.');
+      composeMail('special', 'me', 'domain', 'tld', 'Me', 'HIPPIE')
+      composeMail('.general', 'name', 'domain', 'tld', '', '')
     });
 
     $(document).scroll(function () {