chore: add test github action

Author: lepture

.github/workflows/test.yml

@@ -0,0 +1,16 @@
+name: Run tests
+
+on:
+  push:
+    branches: ["main"]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 18
+      - run: npm ci
+      - run: npm run test:coverage