Initial build.yml for GitHub Actions

Author: greenrobot

.github/workflows/build.yml

@@ -0,0 +1,28 @@
+name: Build and Test
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+      
+    - name: Setup Node.js
+      uses: actions/setup-node@v4
+      with:
+        node-version: '20.x'
+        cache: 'npm'
+        
+    - name: Install dependencies
+      run: npm ci
+      
+    - name: Run type check
+      run: npm run typecheck
+      
+    - name: Build documentation
+      run: npm run build