prepare for automated pypi uploads

The plan is to push tags and let magic happen.

.github/workflows/build-and-upload-to-pypi.yml

@@ -0,0 +1,52 @@
+name: Build and publish Python package to PyPI
+
+on: push
+
+jobs:
+  build:
+    name: Build package
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout sources
+      uses: actions/checkout@v4
+
+    - name: Set up Python (latest)
+      uses: actions/setup-python@v5
+      with:
+        python-version: "3.x"
+
+    - name: Install pypa/build
+      run: python3 -m pip install build --user
+
+    - name: Build a binary wheel and a source tarball
+      run: python3 -m build
+
+    - name: Store the distribution packages
+      uses: actions/upload-artifact@v4
+      with:
+        name: python-package-distributions
+        path: dist/
+
+  publish-to-pypi:
+    name: Publish Python package to PyPI
+    if: startsWith(github.ref, 'refs/tags/')  # only publish to PyPI on tag pushes
+    needs:
+    - build
+    runs-on: ubuntu-latest
+
+    environment:
+      name: pypi
+      url: https://pypi.org/p/system-calls
+    permissions:
+      id-token: write  # IMPORTANT: mandatory for trusted publishing
+
+    steps:
+    - name: Download all the dists
+      uses: actions/download-artifact@v4
+      with:
+        name: python-package-distributions
+        path: dist/
+
+    - name: Publish package to PyPI
+      uses: pypa/gh-action-pypi-publish@release/v1