feat: add llms.txt standard support for AI agent discoverability (#784)

Cherry-picked website/, scripts/generate-llms-full.sh, and deploy-docs.yml
from joyshmitz's PR. Fixed workflow to trigger on main branch instead of
docs/docusaurus-site.

Features:
- Docusaurus documentation site with llms.txt support
- Environment-variable driven config (defaults to steveyegge org)
- Automated llms-full.txt generation from docs
- GitHub Pages deployment workflow

Co-authored-by: joyshmitz <joyshmitz@users.noreply.github.com>

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Executed-By: beads/crew/dave
Rig: beads
Role: crew

.github/workflows/deploy-docs.yml

@@ -0,0 +1,94 @@
+name: Deploy Documentation
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'website/**'
+      - 'scripts/generate-llms-full.sh'
+  workflow_dispatch:
+
+# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+# Allow only one concurrent deployment
+concurrency:
+  group: "pages"
+  cancel-in-progress: true
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: 'npm'
+          cache-dependency-path: website/package-lock.json
+
+      - name: Install dependencies
+        working-directory: website
+        run: npm ci
+
+      - name: Generate llms-full.txt
+        run: ./scripts/generate-llms-full.sh
+
+      - name: Build website
+        working-directory: website
+        run: npm run build
+
+      - name: Check internal links
+        uses: lycheeverse/lychee-action@v2
+        with:
+          args: |
+            --verbose
+            --no-progress
+            --offline
+            --include-fragments
+            --timeout 30
+            --exclude-path 'website/build/search/**'
+            website/build
+          fail: true
+
+      - name: Check external links (non-blocking)
+        uses: lycheeverse/lychee-action@v2
+        continue-on-error: true
+        with:
+          cache: true
+          args: |
+            --verbose
+            --no-progress
+            --timeout 30
+            --scheme https
+            --scheme http
+            --exclude 'localhost'
+            --exclude '127.0.0.1'
+            --exclude 'tree/main'
+            --exclude 'example.com'
+            --exclude 'mailto:'
+            --exclude-path 'website/build/search/**'
+            website/build
+
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: website/build
+
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4