ci: pkg pr new workflow

Author: fbosch

.github/workflows/pkg-pr-new-preview.yml

@@ -0,0 +1,44 @@
+name: pkg.pr.new Preview
+
+on:
+  pull_request:
+    types:
+      - opened
+      - synchronize
+      - reopened
+      - ready_for_review
+  push:
+    branches:
+      - main
+      - master
+
+permissions:
+  contents: read
+  pull-requests: write
+
+jobs:
+  publish-preview:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          run_install: false
+
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: pnpm
+
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
+
+      - name: Build package
+        run: pnpm build
+
+      - name: Publish preview with pkg.pr.new
+        run: pnpm dlx pkg-pr-new publish --packageManager=pnpm --bin docs-cache