.github: add workflow to run flake8

.github/workflows/linting.yml

@@ -0,0 +1,27 @@
+name: Linting
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  flake8:
+    runs-on: ubuntu-24.04
+    
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+      
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: '3.10'
+        
+    - name: Install flake8
+      run: pip install flake8
+        
+    - name: Run flake8
+      run: |
+        flake8 . --count --show-source --statistics