Add GitHub Actions CI workflow and test script

Co-authored-by: danmarshall <11507384+danmarshall@users.noreply.github.com>

Author: Copilot

.github/workflows/ci.yml

@@ -0,0 +1,30 @@
+name: CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    - name: Set up Node.js 18
+      uses: actions/setup-node@v4
+      with:
+        node-version: '18'
+        cache: 'npm'
+
+    - name: Install dependencies
+      run: npm install
+
+    - name: Run build
+      run: npm run build
+
+    - name: Run tests
+      run: npm test

package.json

@@ -6,6 +6,7 @@
     "clean": "npm run clean --workspaces --if-present",
     "build": "npm run build:00 --workspaces --if-present && npm run build:01 --workspaces --if-present && npm run build:02 --workspaces --if-present && npm run build:03 --workspaces --if-present && npm run build:04 --workspaces --if-present && npm run build:05 --workspaces --if-present && npm run build:06 --workspaces --if-present",
     "start": "concurrently \"npm run dev -w common\" \"npm run dev -w @microsoft/interactive-document-markdown\" \"npm run dev -w schema\" \"npm run dev -w @microsoft/interactive-document-compiler\" \"npm run dev -w editor\"",
+    "test": "npm run test --workspaces --if-present",
     "package": "npm run package --workspaces --if-present"
   },
   "repository": {