added test action

.github/workflows/test.yml

@@ -0,0 +1,48 @@
+name: CI
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [ action-examples ]
+  pull_request:
+    branches: [ action-examples ]
+
+concurrency:
+  group: ci-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+
+jobs:
+  build-examples:
+    name: Build Examples Browser
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    - name: Setup Node.js 18.x
+      uses: actions/setup-node@v4
+      with:
+        node-version: 18.x
+        cache: 'npm'
+
+    - name: Install dependencies
+      run: npm clean-install --progress=false --no-fund
+
+    - name: Build PlayCanvas (ES5-only)
+      run: npm run build:es5
+
+    - name: Build PlayCanvas Extras
+      run: npm run build:extras
+
+    - name: Build TypeScript declarations
+      run: npm run build:types
+
+    - name: Build Examples Browser
+      working-directory: ./examples
+      run: |
+        npm clean-install --progress=false --no-fund
+        npm run build