Add CI workflow to test and publish packages

.github/workflows/ci.yml

@@ -0,0 +1,25 @@
+name: build
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: "0"
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 18
+          registry-url: 'https://registry.npmjs.org'
+          scope: '@contentgrid'
+      - run: yarn install --frozen-lockfile
+      - name: Test
+        run: yarn test
+      - name: Publish
+        if: ${{ github.ref_type == 'tag' }}
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
+        run: yarn lerna publish ${{ github.ref_name }} --no-verify-access --yes --no-push