chore(CI): support pkg.pr.new (#766)

Author: Timeless0911

.github/workflows/preview.yml

@@ -0,0 +1,49 @@
+# https://github.com/stackblitz-labs/pkg.pr.new
+name: Preview Release
+
+on:
+  pull_request:
+    types: [closed]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  preview:
+    if: github.repository == 'web-infra-dev/rslib' && github.event.pull_request.merged == true
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 1
+
+      - name: Install pnpm
+        run: |
+          npm install -g corepack@latest --force
+          corepack enable
+
+      - uses: dorny/paths-filter@de90cc6fb38fc0963ad72b210f1f284cd68cea36 # v3.0.2
+        id: changes
+        with:
+          filters: |
+            changed:
+              - "packages/**"
+              - "pnpm-lock.yaml"
+
+      - name: Setup Node.js
+        if: steps.changes.outputs.changed == 'true'
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22
+          cache: 'pnpm'
+
+      - name: Install Dependencies
+        if: steps.changes.outputs.changed == 'true'
+        run: pnpm install
+
+      - name: Publish Preview
+        if: steps.changes.outputs.changed == 'true'
+        run: pnpx pkg-pr-new publish --compact --pnpm