Initial Quartz setup for Castle Docs

.github/workflows/deploy-preview.yaml

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+name: Upload Preview Deployment
+on:
+  workflow_run:
+    workflows: ["Build Preview Deployment"]
+    types:
+      - completed
+
+permissions:
+  actions: read
+  deployments: write
+  contents: read
+  pull-requests: write
+
+jobs:
+  deploy-preview:
+    if: ${{ github.repository == 'jackyzha0/quartz' && github.event.workflow_run.conclusion == 'success' }}
+    runs-on: ubuntu-latest
+    name: Deploy Preview to Cloudflare Pages
+    steps:
+      - name: Download build artifact
+        uses: actions/download-artifact@v7
+        id: preview-build-artifact
+        with:
+          name: preview-build
+          path: build
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          run-id: ${{ github.event.workflow_run.id }}
+
+      - name: Deploy to Cloudflare Pages
+        uses: AdrianGonz97/refined-cf-pages-action@v1
+        with:
+          apiToken: ${{ secrets.CLOUDFLARE_API_TOKEN }}
+          accountId: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
+          githubToken: ${{ secrets.GITHUB_TOKEN }}
+          projectName: quartz
+          deploymentName: Branch Preview
+          directory: ${{ steps.preview-build-artifact.outputs.download-path }}