Add CHANGELOG

CHANGELOG.md

+# Changelog
+
+<!--
+### ✨ Feature
+### 🤏 Minor change
+### 🎨 Interface
+### 🐛 Bugfix
+### 🔒 Security
+### 🚀‍️ CI / CD
+### 🔨 Internal / Developers
+### 📚 Documentation
+
+**💥 Breaking:**
+**⚠️ Deprecation:**
+-->
+
+## 2.0.0 (2023-09-15)
+
+### ✨ 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
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