Add GitHub Action

Author: McSinyx

.github/workflows/debug.yml

@@ -0,0 +1,13 @@
+name: Debugging build and test
+on:
+  - push
+  - pull_request
+jobs:
+  build:
+    runs-on: ubuntu-slim
+    steps:
+    - uses: actions/checkout@v4
+    - name: Build (debugging mode)
+      run: make debug
+    - name: Run regression test suite
+      run: make check