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/database-corruption.md

@@ -0,0 +1,66 @@
+---
+sidebar_position: 2
+title: Database Corruption
+description: Recover from SQLite database corruption
+---
+
+# Database Corruption Recovery
+
+This runbook helps you recover from SQLite database corruption in Beads.
+
+## Symptoms
+
+- SQLite error messages during `bd` commands
+- "database is locked" errors that persist
+- Missing issues that should exist
+- Inconsistent state between JSONL and database
+
+## Diagnosis
+
+```bash
+# Check database integrity
+bd status
+
+# Look for corruption indicators
+ls -la .beads/beads.db*
+```
+
+If you see `-wal` or `-shm` files alongside `beads.db`, a transaction may have been interrupted.
+
+## Solution
+
+:::warning
+Back up your `.beads/` directory before proceeding.
+:::
+
+**Step 1:** Stop the daemon
+```bash
+bd daemon stop
+```
+
+**Step 2:** Back up current state
+```bash
+cp -r .beads .beads.backup
+```
+
+**Step 3:** Rebuild from JSONL (source of truth)
+```bash
+bd doctor --fix
+```
+
+**Step 4:** Verify recovery
+```bash
+bd status
+bd list
+```
+
+**Step 5:** Restart daemon
+```bash
+bd daemon start
+```
+
+## Prevention
+
+- Avoid interrupting `bd sync` operations
+- Let the daemon handle synchronization
+- Use `bd daemon stop` before system shutdown