ci: add clang-format checks (#49)

* ci: add clang-format checks

* try fix last

.github/workflows/clang-format-check.yml

@@ -0,0 +1,17 @@
+name: clang-format
+on: [push, pull_request]
+concurrency:
+  group: ${{ github.workflow }}-${{ github.job }}-${{ github.ref }}
+  cancel-in-progress: true
+jobs:
+  formatting-check:
+    name: Formatting check
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: Run clang-format style check for C/C++/Protobuf programs.
+      uses: jidicula/[email protected]
+      with:
+        clang-format-version: '18'
+        exclude-regex: '(tests\/catch_*.*pp|benchmarks\/catch_*.*pp)'
+        include-regex: '(include\/hpcombi\/*.hpp|tests\/*.cpp|benchmarks\/*.cpp|examples\/*.cpp|examples\/*.h)'