Add object-oriented license client library (v0.0.2)

- Add LicenseClient with PSR-3 logging and PSR-6 caching support
- Add DTO classes: LicenseInfo, LicenseStatus, ActivationResult
- Add LicenseState enum for license status values
- Add comprehensive exception hierarchy for error handling
- Add PSR dependencies (psr/log, psr/cache, psr/http-client)
- Update README with usage examples
- Update CHANGELOG for v0.0.2

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

CHANGELOG.md

@@ -7,6 +7,22 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.0.2] - 2026-01-22
+
+### Added
+
+- Object-oriented client library (`LicenseClient`, `LicenseClientInterface`)
+- DTO classes for API responses (`LicenseInfo`, `LicenseStatus`, `ActivationResult`)
+- `LicenseState` enum for license status values
+- Comprehensive exception hierarchy for error handling
+- PSR-3 logging support (optional)
+- PSR-6 caching support (optional)
+- PSR dependencies (`psr/log`, `psr/cache`, `psr/http-client`)
+
+### Changed
+
+- Updated README with usage examples
+
 ## [0.0.1] - 2026-01-22
 
 ### Added