Release 0.0.2 - JWT implementation improvements and bug fixes

Initial release: Swift JWT package with crypto support

Add comprehensive JWT implementation for Swift with the following features:
- Multiple signing algorithms (HMAC-SHA256/384/512, ECDSA-SHA256)
- Built on swift-rfc-7519 and swift-crypto for standards compliance
- Convenience methods for common JWT operations
- Full signature verification and timing validation
- Type-safe API with comprehensive error handling
- Support for custom claims and header parameters
- Complete test suite with extensive coverage

Includes Package.swift configurations for both Swift 5.9 and 6.0,
comprehensive documentation, and examples for all major use cases.

Platform support: macOS 13.0+, iOS 16.0+