!20 add username to order and item

templates/username.html.twig

@@ -0,0 +1,9 @@
+{% extends 'base.html.twig' %}
+
+{% block title %}Tell me your name{% endblock %}
+
+{% block body %}
+    <h1>Tell me your name</h1>
+    <p>By submitting the form, you agree that your username will be stored as a cookie.</p>
+    {{ include('_form.html.twig') }}
+{% endblock %}