Add GitHub workflow for pytest unit tests

Signed-off-by: Martin Morgenstern <[email protected]>

.github/workflows/test-python.yml

@@ -0,0 +1,20 @@
+---
+name: Run Python unit and regression tests
+
+"on":
+  push:
+    paths:
+      - '**.py'
+      - .github/workflows/test-python.yml
+
+jobs:
+  lint-python-syntax:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.10'
+      - run: pip3 install --upgrade pip setuptools
+      - run: pip3 install -r Tests/test-requirements.txt
+      - run: pytest Tests

Tests/README.md

@@ -114,4 +114,5 @@ It needs to be run in two cases:
 
 Note: The Python version used for running `pip-compile` should be consistent. The currently
 used version is documented in the header of the `requirements.txt`. It should match the
-version used in the Docker image (see [Dockerfile](Dockerfile)).
+version used in the Docker image (see [Dockerfile](Dockerfile)) and in our GitHub
+workflows (`lint-python.yml` and `test-python.yml` in `.github/workflows`).