ci: add a workflow to run ruff lints

Author: indygreg

.github/workflows/ruff.yml

@@ -0,0 +1,11 @@
+on:
+  push:
+  pull_request:
+  schedule:
+    - cron: '30 13 * * *'
+jobs:
+  ruff:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: astral-sh/ruff-action@v1