Add test for changelog formatting

.github/workflows/test-changelog.yaml

@@ -0,0 +1,51 @@
+name: Temporarily test changelog formatting
+on:
+  pull_request:
+
+jobs:
+  build:
+    name: Get changelog
+    runs-on: ubuntu-latest
+    outputs:
+      changelog: ${{ steps.generate_changelog.outputs.changelog }}
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: master
+
+      - name: Install Python tools
+        uses: BrandonLWhite/pipx-install-action@v0.1.1
+      - uses: actions/setup-python@v5
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+          cache: poetry
+
+      - name: Install dependencies
+        run: poetry install --with=release --extras=docs
+
+      - name: Install pandoc
+        run: sudo apt update && sudo apt install pandoc -y
+
+      - name: Obtain the changelog
+        id: generate_changelog
+        run: |
+          {
+            echo 'changelog<<EOF'
+            poe changelog
+            echo EOF
+          } >> "$GITHUB_OUTPUT"
+  test:
+    runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
+    needs: build
+    env:
+      CHANGELOG: ${{ needs.build.outputs.changelog }}
+    steps:
+      - uses: mshick/add-pr-comment@v2
+        with:
+          message: |-
+            ### Commit: ${{ github.sha }}
+            ### Changelog:
+
+            ${{ env.CHANGELOG }}