Introduce CHANGELOG.md

Author: nekeal

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
+### Fixed
+- Fixed typing in cli module
+- Adapt ruff config for a newer version