Update C/C++ workflow to use debug and release modes

.github/workflows/c-cpp.yml

@@ -0,0 +1,19 @@
+name: C/C++ CI
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: make-debug
+      run: make MODE=debug
+    - name: make-release
+      run: make MODE=release
+    - name: make-test
+      run: make MODE=debug test