feat: add GitHub Sponsors support

- Add FUNDING.yml to enable sponsor button
- Add SPONSORS.md with tier information

SPONSORS.md

@@ -0,0 +1,47 @@
+# Sponsors
+
+Thank you to everyone who sponsors this project! Your support keeps the ECC ecosystem growing.
+
+## Enterprise Sponsors
+
+*Become an [Enterprise sponsor](https://github.com/sponsors/affaan-m) to be featured here*
+
+## Business Sponsors
+
+*Become a [Business sponsor](https://github.com/sponsors/affaan-m) to be featured here*
+
+## Team Sponsors
+
+*Become a [Team sponsor](https://github.com/sponsors/affaan-m) to be featured here*
+
+## Individual Sponsors
+
+*Become a [sponsor](https://github.com/sponsors/affaan-m) to be listed here*
+
+---
+
+## Why Sponsor?
+
+Your sponsorship helps:
+
+- **Ship faster** — More time dedicated to building tools and features
+- **Keep it free** — Premium features fund the free tier for everyone
+- **Better support** — Sponsors get priority responses
+- **Shape the roadmap** — Pro+ sponsors vote on features
+
+## Sponsor Tiers
+
+| Tier | Price | Benefits |
+|------|-------|----------|
+| Supporter | $5/mo | Name in README, early access |
+| Builder | $10/mo | Premium tools access |
+| Pro | $25/mo | Priority support, office hours |
+| Team | $100/mo | 5 seats, team configs |
+| Business | $500/mo | 25 seats, consulting credit |
+| Enterprise | $2K/mo | Unlimited seats, custom tools |
+
+[**Become a Sponsor →**](https://github.com/sponsors/affaan-m)
+
+---
+
+*Updated automatically. Last sync: February 2026*