Move to custom SSG instead of eleventy.

docs/renderer/nodes/Block.njk

@@ -0,0 +1,9 @@
+{% from "./Node.njk" import Node %}
+
+{% macro render(node, page) %}
+  <div class="{{ node.class }}">
+    {% for child in node.children %}
+      {{ Node(child.type, child, page) }}
+    {% endfor %}
+  </div>
+{% endmacro %}