clang-format workflow

Author: toy

.github/workflows/clang-format.yml

@@ -0,0 +1,11 @@
+name: clang-format
+on:
+  push:
+  pull_request:
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: clang-format
+      run: clang-format --dry-run --Werror *.c