Add style check workflow.

.github/workflows/pr.yaml

@@ -0,0 +1,20 @@
+name: pr
+
+on:
+  pull_request:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  check-style:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.12'
+      - name: Check style
+        run: ./ci/check_style.sh

ci/check_style.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+# Copyright (c) 2024, NVIDIA CORPORATION.
+
+set -euo pipefail
+
+pip install pre-commit
+
+pre-commit run --all-files --show-diff-on-failure