feat(website): deploy docs to Zephyr Cloud

.github/workflows/deploy-website.yml

@@ -0,0 +1,51 @@
+name: Deploy Website to Zephyr
+
+on:
+  push:
+    branches: [main]
+  workflow_dispatch:
+
+permissions: {}
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: false
+
+jobs:
+  deploy:
+    if: github.repository == 'rstackjs/rstack-cli' && github.ref == 'refs/heads/main'
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    permissions:
+      contents: read
+    steps:
+      - name: Checkout
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          fetch-depth: 0
+
+      - name: Setup Node.js
+        uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
+        with:
+          node-version: 24.21.0
+          package-manager-cache: false
+
+      - name: Install pnpm
+        uses: pnpm/action-setup@ea17c68df8912ef543352723c149a84f56e3d413 # v6.1.0
+        with:
+          run_install: true
+
+      - name: Verify Zephyr token
+        env:
+          ZE_CI_TOKEN: ${{ secrets.ZE_CI_TOKEN }}
+        run: test -n "$ZE_CI_TOKEN" || { echo '::error::Set repository secret ZE_CI_TOKEN.'; exit 1; }
+
+      - name: Build workspace packages
+        run: pnpm build
+
+      - name: Build and deploy website
+        env:
+          ZEPHYR_DEPLOY: 'true'
+          ZE_CI_TOKEN: ${{ secrets.ZE_CI_TOKEN }}
+          ZE_FAIL_BUILD: true
+        run: pnpm --filter rstack-website build