Add CodeQL workflow

.github/workflows/codeql.yml

@@ -0,0 +1,31 @@
+name: codeql
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+permissions:
+  contents: read
+  security-events: write
+  actions: read
+
+jobs:
+  analyze:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+
+    - uses: github/codeql-action/init@c10b8064de6f491fea524254123dbe5e09572f13 # v3.29.5
+      with:
+        languages: c-cpp
+
+    - name: Build
+      run: |
+        cmake -B build -DFMT_DOC=OFF -DFMT_TEST=OFF
+        cmake --build build --parallel
+
+    - uses: github/codeql-action/analyze@c10b8064de6f491fea524254123dbe5e09572f13 # v3.29.5
+      with:
+        category: /language:c-cpp