Add gh action to publish pyscitt to pypi

.github/workflows/publish-pyscitt-to-pypi.yml

@@ -0,0 +1,34 @@
+name: "Publish pyscitt package to PyPi"
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  build_and_publish:
+    name: "Publish pyscitt package to PyPi"
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Get release number from git tag (release) or latest (branch)
+        run: |
+          echo "version=${GITHUB_REF#refs/tags/}" >> $GITHUB_OUTPUT
+        id: tref
+
+      - name: Fetch PyPi Package from release
+        run: |
+          cd pyscitt
+          RELEASE_WHEEL_URL=$(curl -s  https://api.github.com/repos/microsoft/scitt-ccf-ledger/releases/tags/${{steps.tref.outputs.version}} | jq -r '.assets[] | select(.name|test("pyscitt-.*.whl")) | .browser_download_url')
+          echo ${RELEASE_WHEEL_URL}
+          wget ${RELEASE_WHEEL_URL}
+
+      - name: Publish PyPi Package to https://pypi.org/project/pyscitt/
+        run: |
+          set -ex
+          cd pyscitt
+          python3 -m venv env
+          source ./env/bin/activate
+          pip install twine
+          twine upload -u __token__ -p ${{ secrets.PYPI_TOKEN }} *.whl