first commit

_includes/toc.html

@@ -0,0 +1,9 @@
+{% include toc-status.html %}
+
+{% if enable_toc %}
+  <div class="toc-border-cover z-3"></div>
+  <section id="toc-wrapper" class="invisible position-sticky ps-0 pe-4 pb-4">
+    <h2 class="panel-heading ps-3 pb-2 mb-0">{{- site.data.locales[include.lang].panel.toc -}}</h2>
+    <nav id="toc"></nav>
+  </section>
+{% endif %}