add github workflow

.github/workflows/build.yaml

@@ -0,0 +1,18 @@
+name: Build
+
+on: [push, pull_request]
+
+jobs:
+  build-and-test:
+    runs-on: ubuntu-latest
+    name: Build all packages and run tests
+    steps:
+      - name: Checkout 🛎️
+        uses: actions/checkout@v3
+      - name: Build all packages 🔧
+        run: |
+          yarn set version berry
+          yarn install
+          yarn build
+      - name: Run tests 🧪
+        run: yarn test