Add CHANGELOG.md to document project updates and versioning

Author: 0xneobyte

CHANGELOG.md

@@ -0,0 +1,29 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [0.1.1] - 2025-01-11
+
+### Changed
+
+- Updated README to be minimalistic with links to full documentation
+- Updated repository URLs to correct GitHub organization
+
+## [0.1.0] - 2025-01-11
+
+### Added
+
+- Initial release
+- Query endpoint with optional store_id, filters, and model parameters
+- Usage statistics endpoint
+- Plans listing endpoint
+- Structured QueryFilters model
+- Error handling for authentication, rate limits, and quotas
+- Full type hints with Pydantic models
+- Async/await support
+
+[0.1.1]: https://github.com/BrainUsLK/brainus-ai-python/compare/v0.1.0...v0.1.1
+[0.1.0]: https://github.com/BrainUsLK/brainus-ai-python/releases/tag/v0.1.0