Moved everything out of the theme

source/_layouts/talk.html.twig

@@ -0,0 +1,12 @@
+{% extends 'default' %}
+
+{% block content_wrapper %}
+  <h1>{{ page.title }}</h1>
+  {% block content %}{% endblock %}
+
+  {% if page.slides_embed %}
+    <div class="slides">
+      {{ page.slides_embed|raw }}
+    </div>
+  {% endif %}
+{% endblock %}