Install npm dependencies where necessary in generated workflows

.github/workflows/__packaging-config-inputs-js.yml

@@ -67,6 +67,13 @@ jobs:
     steps:
       - name: Check out repository
         uses: actions/checkout@v5
+      - name: Install Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20.x
+          cache: npm
+      - name: Install dependencies
+        run: npm install
       - name: Prepare test
         id: prepare-test
         uses: ./.github/actions/prepare-test