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

website/docs/multi-agent/routing.md

@@ -0,0 +1,116 @@
+---
+id: routing
+title: Routing
+sidebar_position: 2
+---
+
+# Multi-Repo Routing
+
+Automatic issue routing across repositories.
+
+## Overview
+
+Routing enables:
+- Issues created in one repo routed to another
+- Pattern-based routing rules
+- Fallback to default repository
+
+## Configuration
+
+Create `.beads/routes.jsonl`:
+
+```jsonl
+{"pattern": "frontend/**", "target": "frontend-repo", "priority": 10}
+{"pattern": "backend/**", "target": "backend-repo", "priority": 10}
+{"pattern": "docs/**", "target": "docs-repo", "priority": 5}
+{"pattern": "*", "target": "main-repo", "priority": 0}
+```
+
+## Route Fields
+
+| Field | Description |
+|-------|-------------|
+| `pattern` | Glob pattern to match |
+| `target` | Target repository |
+| `priority` | Higher = checked first |
+
+## Pattern Matching
+
+Patterns match against:
+- Issue title
+- Labels
+- Explicit path prefix
+
+**Examples:**
+```jsonl
+{"pattern": "frontend/*", "target": "frontend"}
+{"pattern": "*api*", "target": "backend"}
+{"pattern": "label:docs", "target": "docs-repo"}
+```
+
+## Commands
+
+```bash
+# Show routing table
+bd routes list
+bd routes list --json
+
+# Test routing
+bd routes test "Fix frontend button"
+bd routes test --label frontend
+
+# Add route
+bd routes add "frontend/**" --target frontend-repo --priority 10
+
+# Remove route
+bd routes remove "frontend/**"
+```
+
+## Auto-Routing
+
+When creating issues, beads checks routes:
+
+```bash
+bd create "Fix frontend button alignment" -t bug
+# Auto-routed to frontend-repo based on title match
+```
+
+Override with explicit target:
+
+```bash
+bd create "Fix button" --repo backend-repo
+```
+
+## Cross-Repo Dependencies
+
+Track dependencies across repos:
+
+```bash
+# In frontend-repo
+bd dep add bd-42 external:backend-repo/bd-100
+
+# View cross-repo deps
+bd dep tree bd-42 --cross-repo
+```
+
+## Hydration
+
+Pull related issues from other repos:
+
+```bash
+# Hydrate issues from related repos
+bd hydrate
+
+# Preview hydration
+bd hydrate --dry-run
+
+# Hydrate specific repo
+bd hydrate --from backend-repo
+```
+
+## Best Practices
+
+1. **Use specific patterns** - Avoid overly broad matches
+2. **Set priorities** - Ensure specific patterns match first
+3. **Default fallback** - Always have a `*` pattern with lowest priority
+4. **Test routes** - Use `bd routes test` before committing