Add workflow to run integration tests weekly

.github/workflows/test-integration.yaml

@@ -0,0 +1,29 @@
+name: Integration Test
+
+on:
+  schedule:
+    - cron: '15 8 * * 1'
+  workflow_dispatch:
+
+jobs:
+  test:
+
+    name: Test
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out Git repository
+        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
+
+      - name: Set up Node.js
+        uses: actions/setup-node@1e60f620b9541d16bece96c5465dc8ee9832be0b # v4.0.3
+        with:
+          node-version: 20
+          check-latest: true
+          cache: npm
+
+      - name: Install Node.js dependencies
+        run: npm ci --no-audit
+
+      - name: Run Vitest
+        run: npx vitest **/integration.test.ts