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)

archive/site/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>

archive/site/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>