add CI test workflow

.github/workflows/pr.yaml

@@ -0,0 +1,18 @@
+on:
+  pull_request
+jobs:
+  build-and-test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version-file: ".nvmrc"
+          check-latest: false
+          cache: npm
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run tests
+        run: npm run test