Adds docs/ with a reading-order flow that covers:
- getting started (fork, install, run locally)
- supabase setup + migrations
- whatsapp business api + webhook wiring
- environment variable reference
- hostinger vps deploy walkthrough
- automations cron scheduling
- troubleshooting for the common issues
Rewrites the top-level README as a pointer into docs/ instead of the
create-next-app boilerplate.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
