chore: Release 1.0.0-rc.2 - The 9 Unified Methods 🎯

Enhanced for sustainability and user engagement:
- Added prominent sponsorship section to README
- Enhanced Brain Cloud promotion with FREE trial messaging
- Improved cloud setup flow in CLI with email capture
- Clear pricing: /individual, 9/team after free 100GB
- Added sponsor badges in README header

The 9 Unified Methods are complete and production-ready:
1. add() 2. search() 3. import() 4. addNoun() 5. addVerb()
6. update() 7. delete() 8. augment() 9. export()

Ready for wider testing and feedback from the community!

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@soulcraft/brainy",
-  "version": "1.0.0-rc.1",
+  "version": "1.0.0-rc.2",
   "description": "Multi-Dimensional AI Database - Vector similarity, graph relationships, metadata facets with HNSW indexing and OPFS storage",
   "main": "dist/index.js",
   "module": "dist/index.js",