GitHub Action to run the ruff ASYNC rules

% [`ruff --select=ASYNC .`](https://beta.ruff.rs/docs/rules/open-sleep-or-subprocess-in-async-function)
2	ASYNC101	[ ] Async functions should not call `open`, `time.sleep`, or `subprocess` methods

.github/workflows/ruff.yml

@@ -0,0 +1,16 @@
+# https://beta.ruff.rs
+name: ruff
+on:
+  push:
+    branches: [main, master]
+  pull_request:
+    branches: [main, master]
+jobs:
+  ruff:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - run: pip install --user codespell[toml] ruff
+    - run: codespell || true  # --ignore-words-list="" --skip="*.css,*.js,*.lock,*.po"
+    - run: ruff --format=github --select=E9,F63,F7 --target-version=py38 . || true
+    - run: ruff --format=github --select=ASYNC --target-version=py38 .