test: add pytest.yml

Author: iRingil

.github/workflows/pytest.yml

@@ -25,5 +25,7 @@ jobs:
           if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
           if [ -f requirements-dev.txt ]; then pip install -r requirements-dev.txt; fi
       - name: Test with Pytest
+        env:
+          PYTHONPATH: ${PWD}
         run: |
           pytest --config-file=backend/pyproject.toml backend/tests