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/shortcodes/callout.html

@@ -0,0 +1,16 @@
+{{- /*
+  callout shortcode — wraps content in an ASW callout block.
+  
+  Usage:
+    {{< callout note >}}
+    Content here. Markdown is rendered.
+    {{< /callout >}}
+  
+  First positional param: callout type.
+  Valid types: note, warning, tip, info (maps to ASW data-callout attribute).
+  Default: note
+*/ -}}
+{{- $type := .Get 0 | default "note" -}}
+<aside data-callout="{{ $type }}">
+  {{ .Inner | markdownify }}
+</aside>

packs/hugo/layouts/shortcodes/wikilink.html

@@ -0,0 +1,20 @@
+{{- /*
+  wikilink shortcode — renders an internal link with ASW data-wikilink attribute.
+  
+  Usage:
+    {{< wikilink "Display Text" "/path/to/page/" >}}
+  
+  Param 0 (required): display text
+  Param 1 (optional): href path. Defaults to /display-text-slugified/
+  
+  Examples:
+    {{< wikilink "My Note" >}}
+    → <a href="/my-note/" data-wikilink>My Note</a>
+    
+    {{< wikilink "My Note" "/vault/my-note/" >}}
+    → <a href="/vault/my-note/" data-wikilink>My Note</a>
+*/ -}}
+{{- $text := .Get 0 -}}
+{{- $slug := $text | lower | replace " " "-" -}}
+{{- $href := .Get 1 | default (printf "/%s/" $slug) -}}
+<a href="{{ $href | relURL }}" data-wikilink>{{ $text }}</a>