Add clang-format gh action

Signed-off-by: Thomas Frank <[email protected]>

.github/workflows/format.yml

@@ -0,0 +1,13 @@
+name: Code format check
+
+on: pull_request
+
+jobs:
+  clang-fmt:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Run clang-format
+        uses: jidicula/[email protected]
+        with:
+          clang-format-version: '17'