Add an action to check code style

Author: siddhantwahal

.github/workflows/flake8.yml

@@ -0,0 +1,27 @@
+name: Flake8
+
+on:
+  pull_request
+
+jobs:
+  flake8:
+    strategy:
+      matrix:
+        os: [ubuntu-latest]
+        python-version: ['3.6']
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v3
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install flake8
+      run: |
+        python -m pip install --upgrade pip
+        python -m pip install flake8
+    - name: Run flake8
+      run: |
+        python -m flake8