ci: add test job to pipeline

Author: kaic

.github/workflows/ci.yml

@@ -42,3 +42,22 @@ jobs:
 
       - name: Build project
         run: npm run build
+
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run tests
+        run: npm test