docs: changelog

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/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+[Unreleased]: https://github.com/Nugine/zuc/compare/v0.1.0...HEAD
+
+Features
++ Add ZUC256 keystream generator (#3)
++ Add 128-EEA3 confidentiality algorithm (#4)
++ Add RustCrypto cipher traits implementation (#5)
++ Add ZUC128 benchmark (#7)
+
+Performance
++ Improve ZUC128 performance (#5)
+
+## [0.1.0] - 2024-11-22
+
+[0.1.0]: https://github.com/Nugine/zuc/compare/v0.0.0...v0.1.0
+
++ Add ZUC128 keystream generator
+
+## [0.0.0] - 2024-11-22
+
+[0.0.0]: https://github.com/Nugine/zuc/tree/v0.0.0
+
+Just a placeholder