gh-actions(ci): add unit test step

.github/workflows/ci.yaml

@@ -81,3 +81,34 @@ jobs:
 
       - name: Run e2e tests
         run: npm run test:e2e
+
+  unit:
+    runs-on: ubuntu-latest
+
+    if: ${{ !startsWith(github.event.head_commit.message, 'docs') }}
+    needs: format # Ensures the format job completes before e2e job starts
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+
+      - name: Cache Node modules
+        uses: actions/cache@v4
+        id: cache-node-modules
+        with:
+          path: |
+            node_modules
+            ~/.npm
+          key: ${{ runner.os }}-node-modules-${{ env.NODE_VERSION }}-${{ hashFiles('package-lock.json') }}
+          restore-keys: |
+            ${{ runner.os }}-node-modules-${{ env.NODE_VERSION }}-
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run unit tests
+        run: npm run test