Add a search form to the index

thinks/templates/thinks/index.html

@@ -7,6 +7,15 @@
 {% endblock header %}
 
 {% block main %}
+
+    <form id="search" method="GET" action="{% url 'search' %}">
+        <label for="query">Search</label>
+        <input type="search" id="query" name="query" list="slugs">
+        <datalist id="slugs">
+            {% for think in thinks %}<option value="{{think.slug}}"/>{% endfor %}
+        </datalist>
+    </form>
+
     <section id="templates">
         <h2>Templates</h2>
         <ul id="templates-list">