refactor: restructure docs/ and site/ directories (#43)

* refactor: restructure docs/ and site/ directories

Separate GitHub Pages content from documentation:
- site/ for published HTML (CNAME, pages, slides, llms.txt)
- docs/ for all documentation (design, research, slide sources)
- docs/dev/ absorbs former top-level dev/ (plans, specs)
- Add GitHub Actions workflow to deploy Pages from site/
- Update CLAUDE.md project structure table

Closes #41

Assisted-By: Claude (Anthropic AI) <noreply@anthropic.com>
Signed-off-by: Pavel Anni <panni@redhat.com>

* docs: add demo link to landing page

Assisted-By: Claude (Anthropic AI) <noreply@anthropic.com>
Signed-off-by: Pavel Anni <panni@redhat.com>

---------

Signed-off-by: Pavel Anni <panni@redhat.com>

Author: pavelanni

.github/workflows/pages.yaml

@@ -0,0 +1,31 @@
+name: Deploy GitHub Pages
+
+on:
+  push:
+    branches: [main]
+    paths: [site/**]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: pages
+  cancel-in-progress: false
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/configure-pages@v5
+      - uses: actions/upload-pages-artifact@v3
+        with:
+          path: site
+      - id: deployment
+        uses: actions/deploy-pages@v4

CLAUDE.md

@@ -37,8 +37,9 @@ make fmt         # Format code
 | `schemas/` | JSON Schema for SkillCard |
 | `api/` | OpenAPI 3.1 spec |
 | `deploy/` | Dockerfile, Kustomize overlays |
-| `docs/` | Published site (GitHub Pages) |
-| `dev/` | Internal plans and specs |
+| `site/` | GitHub Pages content (HTML, CNAME, slides) |
+| `docs/` | Documentation (design, research, slide sources) |
+| `docs/dev/` | Internal plans and specs |
 
 ## Architecture