feat(workflows): add cleanup step for old dev versions

- Introduces a step to remove old development versions using a script
- Helps maintain a cleaner environment during nightly builds

.gitea/workflows/build-and-deploy-nightly.yml

@@ -53,3 +53,10 @@ jobs:
           TWINE_PASSWORD: ${{ secrets.TWINE_PASSWORD }}
         run: |
           poetry run twine upload --repository-url ${{ secrets.TWINE_URL }} dist/*
+
+      - name: Cleanup old dev versions
+        run: |
+          .gitea/scripts/cleanup_versions.sh '\.dev'
+        env:
+          TWINE_USERNAME: ${{ secrets.TWINE_USERNAME }}
+          TWINE_PASSWORD: ${{ secrets.TWINE_PASSWORD }}