Move talks into separate include files

source/_includes/talk-listing-item.html.twig

@@ -1,15 +1,13 @@
-<li>
-    <strong>{% spaceless %}
-        {% if talk.fuzzy_date %}
-            {{ talk.date|date('F') }}
-        {% else %}
-            {{ talk.date|date('jS F') }}
-        {% endif %}
-    {% endspaceless %}</strong> - {{ talk.event.name }}
-    -
+<strong>{% spaceless %}
     {% if talk.fuzzy_date %}
-        {{ talk.title }}
+        {{ talk.date|date('F') }}
     {% else %}
-        <a href="{{ talk.url }}">{{ talk.title }}</a>
+        {{ talk.date|date('jS F') }}
     {% endif %}
-</li>
+{% endspaceless %}</strong> - {{ talk.event.name }}
+-
+{% if talk.fuzzy_date %}
+    {{ talk.title }}
+{% else %}
+    <a href="{{ talk.url }}">{{ talk.title }}</a>
+{% endif %}