chore(ci): add clang-format check

Signed-off-by: Coelacanthus <uwu@coelacanthus.name>

Author: CoelacanthusHex

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

@@ -0,0 +1,13 @@
+name: clang-format Check
+on: [push, pull_request]
+jobs:
+  formatting-check:
+    name: Formatting Check
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v5
+    - name: Run clang-format style check.
+      uses: jidicula/clang-format-action@v4.15.0
+      with:
+        clang-format-version: '20'
+        exclude-regex: '^(cjson|dlfcn-win32)/.*'