ci: Add NPM CI workflow for testing and building

.github/workflows/npm.yml

@@ -0,0 +1,46 @@
+name: NPM CI
+
+on:
+  push:
+  pull_request:
+    branches: ["main"]
+
+jobs:
+  build:
+    name: Test & Build
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [18.x]
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v3
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: "npm"
+
+      - name: Display Node.js version
+        run: node -v
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Cache node_modules
+        uses: actions/cache@v3
+        with:
+          path: ~/.npm
+          key: ${{ runner.os }}-node-${{ hashFiles('package-lock.json') }}
+          restore-keys: |
+            ${{ runner.os }}-node-
+
+      - name: Build the project
+        run: npm run build --if-present
+
+      - name: Run tests
+        run: npm test