SMA-20: added checkstyle-react to workflows

.github/workflows/checkstyle-react.yml

@@ -0,0 +1,28 @@
+name: Check the React source code
+
+on: [ push, pull_request ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: ./frontend/sportsmatch-app
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/[email protected]
+        with:
+          node-version: latest
+
+      - name: Install dependencies
+        run: npm install
+
+      - name: Prettier
+        run: npm run format
+
+      - name: Lint
+        run: npm run lint