ci: Add preview workflow (#113)

* ci: Add preview workflow

* Add approved conditional

Author: lachlancollins

.github/workflows/preview.yml

@@ -0,0 +1,27 @@
+name: preview
+
+on:
+  pull_request_review:
+    types: [submitted]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.number || github.ref }}
+  cancel-in-progress: true
+
+env:
+  NX_CLOUD_ACCESS_TOKEN: ${{ secrets.NX_CLOUD_ACCESS_TOKEN }}
+
+jobs:
+  preview:
+    name: Preview
+    if: github.event.review.state == 'APPROVED'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Setup Tools
+        uses: tanstack/config/.github/setup@main
+      - name: Publish Previews
+        run: pnpx pkg-pr-new publish --no-template --compact ./packages/*