asw-v01: archive deferred content (packs, site, lab, legacy examples)

- 2.1: packs/ -> archive/packs/
- 2.2: site/ -> archive/site/
- 2.3: src/lab/ -> archive/lab/
- 2.4: examples/ -> archive/examples-legacy/ (SSI-based)

site/layouts/notes/single.html

@@ -1,39 +0,0 @@
-{{ define "content" }}
-  <section data-layout="docs">
-
-    <nav aria-label="Notes" data-nav="sidebar">
-      {{- with .CurrentSection -}}
-      <h3>{{ .Title }}</h3>
-      <ul>
-        {{- range .RegularPages.ByWeight -}}
-        <li>
-          <a href="{{ .RelPermalink }}"
-            {{- if eq .RelPermalink $.RelPermalink }} aria-current="page"{{ end -}}>
-            {{- .LinkTitle -}}
-          </a>
-        </li>
-        {{- end -}}
-      </ul>
-      {{- end -}}
-    </nav>
-
-    <article>
-      <header>
-        <h1>{{ .Title }}</h1>
-        {{- with .Description }}
-        <p>{{ . }}</p>
-        {{- end }}
-      </header>
-
-      {{ .Content }}
-    </article>
-
-    {{- with .TableOfContents -}}
-    <aside data-toc>
-      <h3>{{ i18n "onThisPage" | default "On this page" }}</h3>
-      {{ . }}
-    </aside>
-    {{- end -}}
-
-  </section>
-{{ end }}