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/recovery/sync-failures.md

@@ -0,0 +1,74 @@
+---
+sidebar_position: 5
+title: Sync Failures
+description: Recover from bd sync failures
+---
+
+# Sync Failures Recovery
+
+This runbook helps you recover from `bd sync` failures.
+
+## Symptoms
+
+- `bd sync` hangs or times out
+- Network-related error messages
+- "failed to push" or "failed to pull" errors
+- Daemon not responding
+
+## Diagnosis
+
+```bash
+# Check daemon status
+bd daemon status
+
+# Check sync state
+bd status
+
+# View daemon logs
+cat .beads/daemon.log | tail -50
+```
+
+## Solution
+
+**Step 1:** Stop the daemon
+```bash
+bd daemon stop
+```
+
+**Step 2:** Check for lock files
+```bash
+ls -la .beads/*.lock
+# Remove stale locks if daemon is definitely stopped
+rm -f .beads/*.lock
+```
+
+**Step 3:** Force a fresh sync
+```bash
+bd doctor --fix
+```
+
+**Step 4:** Restart daemon
+```bash
+bd daemon start
+```
+
+**Step 5:** Verify sync works
+```bash
+bd sync
+bd status
+```
+
+## Common Causes
+
+| Cause | Solution |
+|-------|----------|
+| Network timeout | Retry with better connection |
+| Stale lock file | Remove lock after stopping daemon |
+| Corrupted state | Use `bd doctor --fix` |
+| Git conflicts | See [Merge Conflicts](/recovery/merge-conflicts) |
+
+## Prevention
+
+- Ensure stable network before sync
+- Let sync complete before closing terminal
+- Use `bd daemon stop` before system shutdown