Add GitHub Actions workflow for pre-commit checks

.clang-format

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+# Start with a built-in style and modify it
+BasedOnStyle: Google
+
+# Overrides
+ColumnLimit: 120

.github/workflows/main.yml

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+name: pre-commit
+
+on:
+  pull_request:
+  push:
+    branches: [main]
+
+jobs:
+  pre-commit:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - uses: actions/setup-python@v3
+    - uses: pre-commit/[email protected]

.pre-commit-config.yaml

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+repos:
+- repo: https://github.com/pre-commit/mirrors-clang-format
+  rev: v17.0.6 # Or pin to your preferred clang-format version
+  hooks:
+  - id: clang-format
+    files: \.(c|h|cpp|hpp|proto|cu|cuh)$
+    exclude: ^(apex/contrib/csrc/multihead_attn/cutlass|apex/contrib/csrc/cudnn-frontend)/
+
+# TODO: Enable Ruff
+# - repo: https://github.com/astral-sh/ruff-pre-commit
+#   rev: v0.14.0
+#   hooks:
+#   - id: ruff-check
+#     args: ["--fix"]
+#   - id: ruff-format
+#     types_or: [python]
+#     exclude: "examples"