feat: update to capiscio-core v2.2.0

[beonde]

Summary

Updates the GitHub Action to use capiscio-core v2.2.0, bringing it in sync with the latest release.

Changes

Version Update

• Update CAPISCIO_VERSION from 1.0.2 to 2.2.0 in src/index.ts
• Update README documentation to reference v2.2.0

Rebuild

• Rebuild dist bundle with updated version using npm run build
• Updated compiled JavaScript with new version constant

What's New in capiscio-core v2.2.0

The GitHub Action now downloads and uses capiscio-core v2.2.0, which includes:

• RFC-003 Support: Key Ownership Proof (PoP) protocol with IAL-1 badges
• Enhanced Badge Schema: Support for cnf, ial, nbf claims
• Improved Scoring: Updated scoring algorithms
• gRPC Server: Auto-starting gRPC server for SDK integration
• New CLI Commands: badge keep, gateway start, rpc, key gen

Benefits

✅ Access to latest validation features
✅ RFC-003 PoP protocol support
✅ Improved badge verification with IAL claims
✅ Enhanced security with key binding validation
✅ Compatibility with v2.2.0 agent cards

Testing

• Action installs correct binary version (v2.2.0)
• Validation still works with existing agent cards
• JSON output parsing works with new scoring format
• All inputs/outputs function correctly

Breaking Changes

None - the action API remains unchanged. This is a transparent upgrade to the underlying binary.