workflows: add style check workflow

Signed-off-by: Marcel Cornu <[email protected]>

.github/workflows/style.yml

@@ -0,0 +1,34 @@
+name: Style Check
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+permissions:
+  contents: read
+
+jobs:
+  # Style check with clang-format 18
+  style-check:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Install packages
+      run: |
+        wget https://apt.llvm.org/llvm.sh
+        chmod +x llvm.sh
+        sudo ./llvm.sh 18
+        sudo apt install -y nasm clang-format-18
+
+    - name: Checkout repo
+      uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
+      with:
+        repository: 'intel/intel-ipsec-mb'
+
+    - name: Configure CMake
+      run: cmake -B ${{github.workspace}}/build -DCLANG_FORMAT_BIN=clang-format-18
+
+    - name: Run style check
+      run: cmake --build ${{github.workspace}}/build --target style