Add Founding Sponsors section and update README with detailed project information

- Introduced a new section in SPONSORS.md to recognize the first 50 sponsors as Founding Sponsors.
- Updated README-first.md to include comprehensive project details, features, installation instructions, and advanced usage examples.
- Highlighted the recent version 0.7.0 release with new features and improvements.
- Added a sponsorship program with tiered benefits and a mission statement to promote data democratization.

SPONSORS.md

@@ -2,6 +2,14 @@
 
 Thank you to everyone supporting Crawl4AI! Your sponsorship helps keep this project open-source and actively maintained.
 
+## 👑 Founding Sponsors
+*The first 50 sponsors who believed in our vision - permanently recognized*
+
+<!-- Founding sponsors will be listed here with special recognition -->
+🎉 **Become a Founding Sponsor!** Only [X/50] spots remaining! [Join now →](https://github.com/sponsors/unclecode)
+
+---
+
 ## 🏢 Data Infrastructure Partners ($2000/month)
 *These organizations are building their data sovereignty with Crawl4AI at the core*