Add CHANGELOG

CHANGELOG.md

+# Changelog
+
+## 2.0.0 (?)
+
+### Feature
+- Added license: AGPLv3
+
+### Interface
+- 🔴 Breaking: Renamed `enonce` to `assignment`
+- 🔴 Breaking: Renamed `exercice` to `exercise`
+
+### Internal / Developers
+- Auto release by pipeline
+  - For vX.Y.Z branch create release and tag with `-dev` suffix
+  - For main branch create definitive release and remove `-dev` releases
+
+
+## 1.0.1 (2023-08-12)
+
+### Feature
+- Initial release of the project
+
+<!--
+### Feature
+### Minor change
+### Interface
+### Bugfix
+### Internal / Developers
+### Documentation
+
+🔴 Breaking: 
+⚠️ Deprecation: ️
+-->
\ No newline at end of file