Release v0.8.1: SDK documentation and CLI improvements

Release v0.8.0 - Simple API + Production Cleanup

- New simple API with 5 functions: reason(), explore(), solve(), debate(), refine()
- Clean CLI with 'think' command
- Test mode for development without API calls
- 72% file reduction for cleaner codebase
- Production-ready with optimized defaults

Release v0.7.1: Fix CLI command registration

Release v0.7.0

Release version 0.6.0

Release version 0.5.1

ThinkThread SDK 0.5.0 release