refacto: rename html and rs templates dirs to old_*

crates/app/old_templates/layout/nav/nav-menu-items.html

@@ -0,0 +1,14 @@
+{% for item in items %}
+  <a
+    href=""
+    hx-get="{{ item.href }}"
+    hx-trigger="click"
+    hx-target="#main-container"
+    hx-swap="innerHTML"
+    hx-push-url="true"
+    class="{{ Self::get_classes(self, item.current) }}"
+    aria-current="{% if item.current %}page{% endif %}"
+  >
+    {{ item.label }}
+  </a>
+{% endfor %}