feat: add npm test workflow (#61)

Author: manuelsanchez2

.github/workflows/npm-test.yaml

@@ -0,0 +1,38 @@
+name: npm test
+
+on:
+  workflow_dispatch:
+  push:
+    branches-ignore:
+      - 'main'
+    paths:
+      - '.github/workflows/npm-test.yaml'
+      - 'package.json'
+      - 'package-lock.json'
+      - 'src/**'
+  pull_request:
+    paths:
+      - '.github/workflows/npm-test.yaml'
+      - 'package.json'
+      - 'package-lock.json'
+      - 'src/**'
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 24
+          cache: npm
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run tests
+        run: npm run test