Add a linting step

Author: abrookins

.github/workflows/python-tests.yml

@@ -7,7 +7,28 @@ on:
     branches: [ main ]
 
 jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Set up Python
+      uses: actions/setup-python@v4
+      with:
+        python-version: '3.12'
+        cache: 'pip'
+
+    - name: Install pre-commit
+      run: |
+        python -m pip install --upgrade pip
+        pip install pre-commit
+
+    - name: Run pre-commit
+      run: |
+        pre-commit run --all-files
+
   test:
+    needs: lint
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v3