feat(scripts): generate README sponsor tiers from Open Collective

updateSponsors.mts now fetches active recurring contributions from the
Open Collective GraphQL API, groups them by tier and rewrites the tier
sections in README.md between new markers, then propagates the block to
the package READMEs as before. Use --skip-fetch to only propagate.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VRsauu8mwJpB9y88vMMQ7n

packages/angular/README.md

@@ -73,6 +73,8 @@ Lucide is licensed under the ISC license. See [LICENSE](https://lucide.dev/licen
 
 <a href="https://www.digitalocean.com/?refcode=b0877a2caebd&utm_campaign=Referral_Invite&utm_medium=Referral_Program&utm_source=badge"><img src="https://lucide.dev/digitalocean.svg" width="200" alt="DigitalOcean Referral Badge" /></a>
 
+[//]: <> (Sponsor tiers start)
+
 ### Hero backers 🦸
 
 <a href="https://zephyr-cloud.io/"><img src="https://lucide.dev/sponsors/zephyr-cloud.svg" width="180" alt="Zephyr Cloud – From idea to prod: fast micro-frontend delivery!" /></a>
@@ -86,6 +88,8 @@ Lucide is licensed under the ISC license. See [LICENSE](https://lucide.dev/licen
 
 <a href="https://www.fina.money/"><img src="https://lucide.dev/sponsors/fina-money.png" width="180" alt="Fina Money – Modular Finance Tracker" /></a>
 
+[//]: <> (Sponsor tiers end)
+
 ### Other contributors 💸
 
 You can find all our past and non-recurring financial contributors at [our Open Collective page](https://opencollective.com/lucide-icons).