Configure clang-format to run on each PR

Signed-off-by: Janek Łukaszewicz <janluk@google.com>

Author: oxddr

.clang-format

@@ -0,0 +1,2 @@
+BasedOnStyle: Google
+Language: Cpp

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

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+name: clang-format
+
+on:
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v5
+    - name: Run clang-format
+      uses: jidicula/clang-format-action@v4.16.0
+      with:
+        github_token: ${{ secrets.GITHUB_TOKEN }}
+        check-path: 'include'
+        clang_format_version: 21