Port homepage, posts section, shortcodes; update hugo.toml menus

- content/_index.md: homepage with site description and callout examples
- content/posts/asw-vocabulary.md: ASW data-* attribute vocabulary reference
- content/posts/getting-started.md: ASW-Hugo setup guide (updated URLs)
- hugo.toml: add params, taxonomies, menus (main + docs sidebar), ToC settings
- layouts/partials/nav.html: dynamic Hugo menu rendering (was hardcoded)
- layouts/shortcodes/callout.html, wikilink.html: ported from asw-hugo theme

Closes: asw#17, asw#13, asw#11, asw#16
28 pages build clean, deploy confirmed at port 8000.

content/posts/getting-started.md

@@ -0,0 +1,51 @@
+---
+title: "Getting Started with ASW-Hugo"
+description: "How to set up the ASW-Hugo pack in your Hugo project."
+date: 2026-04-08
+tags: [setup, hugo, asw]
+ai-disclosure: "generated"
+ai-model: "claude-sonnet-4-5"
+ai-provider: "Anthropic"
+
+---
+
+# Getting Started with ASW-Hugo
+
+The ASW-Hugo pack is a theme that outputs [Agentic Semantic Web](https://asw.trentuna.com/) semantic HTML from your Hugo Markdown content.
+
+## Installation
+
+1. Copy or symlink `packs/hugo/` from the ASW repo:
+   ```bash
+   ln -s /path/to/agentic-semantic-web/packs/hugo/ themes/asw-hugo
+   ```
+
+2. Set `theme = "asw-hugo"` in your `hugo.toml`.
+
+3. Add tag taxonomy:
+   ```toml
+   [taxonomies]
+     tag = "tags"
+   ```
+
+4. Wire ASW CSS:
+   ```bash
+   cp /path/to/agentic-semantic-web/agentic.css \
+      themes/asw-hugo/static/css/asw.css
+   ```
+
+5. Build:
+   ```bash
+   hugo
+   ```
+
+## What you get
+
+- Semantic HTML output: `<article>`, `<section data-layout="grid">`, `<aside data-callout>`
+- Tag navigation at `/tags/`
+- Callout blocks: `{{</* callout note */>}} ... {{</* /callout */>}}`
+- Wikilinks: `{{</* wikilink "Text" "/path/" */>}}`
+
+{{< callout tip >}}
+The ASW-Hugo pack uses **system font stacks** by default — no external font loading required.
+{{< /callout >}}