Add initial GitHub Actions CI workflow

Author: sagar-ruby

.github/workflows/ci.yml

@@ -0,0 +1,12 @@
+name: CI
+
+on:
+  pull_request:
+  push:
+    branches: [ main ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4