first commi

system/templates/flex/404.html.twig

@@ -0,0 +1,4 @@
+{% set item = collection ?? object %}
+{% set type = collection ? 'collection' : 'object' %}
+
+ERROR: Layout '{{ layout }}' for flex {{ type }} '{{ item.flexType() }}'  was not found.

system/templates/flex/_default/collection/debug.html.twig

@@ -0,0 +1,5 @@
+<h1>{{ directory.getTitle() }} <small>debug dump</small></h1>
+
+{% for object in collection %}
+    {% render object layout: layout %}
+{% endfor %}

system/templates/flex/_default/object/debug.html.twig

@@ -0,0 +1,4 @@
+<section>
+    <h2>{{ object.key }}</h2>
+    <pre>{{ object.jsonSerialize()|yaml_encode }}</pre>
+</section>