Replace flake8 with ruff (both linting and formatting)

Author: gkreitz

.github/workflows/python-app.yml

@@ -27,15 +27,12 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install flake8 pytest mypy
+        pip install mypy ruff pytest
         if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
-    - name: Lint with flake8
-      run: |
-        # stop the build if there are Python syntax errors or undefined names
-        # Exclude examples as there is some python2 code there
-        flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics --exclude examples/
-        # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
-        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics --exclude examples/
+    - name: Lint with ruff
+      run: ruff check --output-format=github
+    - name: Check ruff formatting
+      run: ruff format --check --diff
     - name: Test with pytest
       run:  pytest
     - name: Run mypy