add workflow for publishing a release on pypi

.github/workflows/publish_pypi.yml

@@ -0,0 +1,50 @@
+name: Build and publish on PyPI
+
+on:
+  release:
+    types: [published]
+    tags: ["v*.*.*"]
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: Build package
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    steps:
+      - name: Check out ${{ github.ref_name }}
+        uses: actions/checkout@v4
+      - name: Set up Python 3.11
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+      - name: Install build
+        run: |
+          python -m pip install build
+      - name: Run build
+        run: python -m build
+      - name: Store the distribution packages
+        uses: actions/upload-artifact@v4
+        with:
+          name: python-package-distributions
+          path: dist/
+
+  publish_pypi:
+    name: Publish on PyPI
+    needs:
+      - build
+    runs-on: ubuntu-latest
+    environment:
+      name: pypi
+      url: https://pypi.org/project/fast-forward-indexes/
+    permissions:
+      id-token: write
+    steps:
+      - name: Download the distribution packages
+        uses: actions/download-artifact@v4
+        with:
+          name: python-package-distributions
+          path: dist/
+      - name: Publish
+        uses: pypa/gh-action-pypi-publish@release/v1