feat: legacy import — packs, examples, lab, themes, docs, lineage

Import from agentic-semantic-web/ into restructured repo:
- 7 packs (apache, caddy, flask, hugo, nginx, pandoc, python)
- shared error pages (403-503)
- 17 lab experiments (boilerplate, charts, misc)
- 31 example pages (charts, components, content, layout, vault)
- 2 themes (garden, trentuna stub)
- 4 docs (llms.txt, vocabulary, philosophy, agent-directive)
- lineage.md (Pico/Open Props/Charts.css history)
- Hugo mounts for lab/ and examples/

All agentic.css references updated to asw.css.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

packs/hugo/layouts/_default/list.html

@@ -0,0 +1,39 @@
+{{ define "main" }}
+<section>
+  <header>
+    <h1>{{ .Title }}</h1>
+    {{- with .Description }}<p>{{ . }}</p>{{- end }}
+  </header>
+
+  {{- if .IsHome }}
+  {{- partial "tag-nav.html" . }}
+  {{- end }}
+
+  <section data-layout="grid">
+    {{- range .Pages }}
+    <article>
+      <header>
+        <h3>
+          <a href="{{ .RelPermalink }}" data-wikilink>{{ .Title }}</a>
+        </h3>
+        {{- if not .Date.IsZero }}
+        <time datetime="{{ .Date.Format "2006-01-02" }}">{{ .Date.Format "Jan 2, 2006" }}</time>
+        {{- end }}
+      </header>
+
+      {{- with .Summary }}
+      <p>{{ . }}</p>
+      {{- end }}
+
+      {{- with .GetTerms "tags" }}
+      <footer>
+        {{- range . }}
+        <a href="{{ .Permalink }}" data-tag="{{ .Name }}">{{ .Name }}</a>
+        {{- end }}
+      </footer>
+      {{- end }}
+    </article>
+    {{- end }}
+  </section>
+</section>
+{{ end }}