added github workflow

.github/workflows/formatting.yml

@@ -0,0 +1,21 @@
+name: Code Formatting
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v3
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip isort
+        python -m pip install pre-commit
+    - name: Run pre-commit
+      run: python -m pre_commit run --all-files