add workflow: check_pr

.github/workflows/check_pr.yml

@@ -0,0 +1,29 @@
+name: Check Pull Request
+
+on:
+  pull_request:
+    types: [opened, reopened]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0 
+
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: npm 
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Test build with VitePress
+        run: |
+          npm run build