add github action for testing

.github/workflows/ci.yml

@@ -0,0 +1,13 @@
+name: CI
+on: [push]
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install dependencies
+        run: |
+            sudo snap install zig --classic --edge
+            zig version
+      - name: test
+        run: zig build test