chore(vscode): add testing in gha (#4670)

Author: benfdking

.github/dependabot.yml

@@ -4,3 +4,7 @@ updates:
     directory: '/'
     schedule:
       interval: 'weekly'
+  - package-ecosystem: 'github-actions'
+    directory: '/'
+    schedule:
+      interval: 'weekly'

.github/workflows/pr.yaml

@@ -0,0 +1,27 @@
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+concurrency:
+  group: 'pr-${{ github.event.pull_request.number }}'
+  cancel-in-progress: true
+jobs:
+  test-vscode:
+    env:
+      PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: 1
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+      - uses: pnpm/action-setup@v4
+        with:
+          version: latest
+      - name: Install dependencies
+        run: pnpm install
+      - name: Run CI
+        run: pnpm run ci