workflow: add tests to workflow

.github/workflows/python.yml

@@ -20,4 +20,19 @@ jobs:
         run: |
           pip install --upgrade pip
           pip install black=="23.12.1"
-      - run: black --check scripts/ --exclude pica
+      - run: black --check tests/
+  tests:
+    name: Test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set Up Python 3.11
+        uses: actions/setup-python@v4
+        with:
+          python-version: 3.11
+      - name: Install
+        run: |
+          pip install --upgrade pip
+          pip install ./py/pica/
+          pip install pytest=="7.4.4"
+      - run: pytest --log-cli-level=DEBUG -v