add a release workflow

.github/workflows/release.yml

@@ -0,0 +1,34 @@
+
+name: Python package
+on:
+  push:
+    tags:
+      - '*'
+  release:
+    types: [published]      
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: Set up Python 3.9
+      uses: actions/setup-python@v4
+      with:
+        python-version: 3.9
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install hatch
+    - name: Test the project  
+      run: hatch run test:cov
+    - name: Build
+      run: hatch build
+    - name: Publish package
+      run: hatch publish -r test --user ${{secrets.HATCH_INDEX_USER}} --auth ${{secrets.HATCH_TEST_INDEX_AUTH}}
+      if: github.event_name != 'release'
+    - name: Test the released packaged
+      run: hatch run released:test
+      if: github.event_name != 'release'
+    - name: Publish to mainline
+      run: hatch publish --user ${{secrets.HATCH_INDEX_USER}} --auth ${{secrets.HATCH_INDEX_AUTH}}
+      if: github.event_name != 'release'