add CHANGELOG.md

CHANGELOG.md

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+
+# 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/1.1.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Eventual]
+
+### Added
+
+### Changed
+
+## [0.1.0] - 2025-12-21
+
+- initialized project
+- added CHANGELOG.md