add create plan modal markup

views/templates/home.php

@@ -7,6 +7,9 @@
     <h1>Home</h1>
     <ul id="texts-list">
     </ul>
+    <div id="create-plan-modal" hidden>
+        <h2>Create plan</h2>
+    </div>
     <script src="/js/home.js"></script>
 </body>
 </html>