workflow: add python workflow to enforce formatting (#56)

.github/workflows/python.yml

@@ -0,0 +1,23 @@
+name: Python Format
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  format:
+    name: Check Python formatting
+    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 black=="23.12.1"
+      - run: black --check scripts/ --exclude pica