Add Python lint workflow.

.github/workflows/python-lint.yml

@@ -0,0 +1,19 @@
+name: Python lint
+on: [push]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: '3.x'
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install -r requirements.txt
+    - name: Lint with Ruff
+      run: |
+        pip install ruff
+        ruff check --output-format=github .
+      continue-on-error: true