chore: adapt theme to new template system (#696)

* Adapted theme's layout to [Hugo v0.146.0](https://gohugo.io/templates/new-templatesystem-overview/)
* Bumped minimal Hugo version to v0.146.0

layouts/list.html

@@ -0,0 +1,17 @@
+{{ define "main" }}
+  <div class='hx:mx-auto hx:flex hextra-max-page-width'>
+    {{ partial "sidebar.html" (dict "context" .) }}
+    {{ partial "toc.html" . }}
+    <article class="hx:w-full hx:break-words hx:flex hx:min-h-[calc(100vh-var(--navbar-height))] hx:min-w-0 hx:justify-center hx:pb-8 hx:pr-[calc(env(safe-area-inset-right)-1.5rem)]">
+      <main class="hx:w-full hx:min-w-0 hx:max-w-6xl hx:px-6 hx:pt-4 hx:md:px-12">
+        <div class="content">
+          {{ if .Title }}<h1>{{ .Title }}</h1>{{ end }}
+          {{ .Content }}
+        </div>
+        <div class="hx:mt-16"></div>
+        {{ partial "components/last-updated.html" . }}
+        {{ partial "components/comments.html" . }}
+      </main>
+    </article>
+  </div>
+{{ end }}