add format check

Signed-off-by: Michael Olbrich <[email protected]>

.github/workflows/format.yml

@@ -0,0 +1,18 @@
+name: format
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-24.04
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Install required packages
+      run: |
+        sudo apt-get install clang-format-16
+
+    - name: Check format
+      run: |
+        clang-format-16 --dry-run --Werror *.c genimage.h