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/archetypes/default.md

@@ -0,0 +1,17 @@
+---
+title: "{{ replace .Name "-" " " | title }}"
+date: {{ .Date }}
+draft: true
+description: ""
+tags: []
+---
+
+<!-- Write content here. Use shortcodes for ASW-specific elements:
+
+{{< callout note >}}
+This is a note.
+{{< /callout >}}
+
+{{< wikilink "Related Page" "/related-page/" >}}
+
+-->