chore: import upstream snapshot with attribution

.github/workflows/docs_search_sync.yml

@@ -0,0 +1,60 @@
+name: Docs Search Sync
+
+on:
+  workflow_dispatch: # Activate this workflow manually
+  schedule:
+    - cron: "0 1 * * *"
+
+# Running this workflow multiple times in parallel can cause issues with files uploads and deletions.
+concurrency:
+  group: docs-search-sync
+  cancel-in-progress: false
+
+permissions:
+  contents: read
+
+jobs:
+  docs-search-sync:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout Haystack repo
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
+        with:
+          persist-credentials: false
+
+      - name: Install Node.js
+        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
+        with:
+          node-version: "22"
+
+      - name: Install Python
+        uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1 # v6.3.0
+        with:
+          python-version: "3.12"
+
+      - name: Install Docusaurus and build docs-website
+        working-directory: docs-website
+        run: |
+          npm install --ignore-scripts
+          npm rebuild sharp
+          npm run build
+
+      - name: Install script dependencies
+        # sniffio is needed because of https://github.com/deepset-ai/deepset-cloud-sdk/issues/286
+        # we pin pyrate-limiter due to https://github.com/deepset-ai/deepset-cloud-sdk/issues/295
+        run: |
+          python -m pip install --upgrade pip
+          pip install deepset-cloud-sdk sniffio requests "pyrate-limiter<4" --uploaded-prior-to=P1D
+
+      - name: Update new docs to Search pipeline and remove outdated docs
+        env:
+          DEEPSET_WORKSPACE_DOCS_SEARCH: ${{ secrets.DEEPSET_WORKSPACE_DOCS_SEARCH }}
+          DEEPSET_API_KEY_DOCS_SEARCH: ${{ secrets.DEEPSET_API_KEY_DOCS_SEARCH }}
+        run: python ./.github/utils/docs_search_sync.py
+
+      - name: Notify Slack on nightly failure
+        if: failure() && github.event_name == 'schedule'
+        uses: deepset-ai/notify-slack-action@a65def0c8bf91d6520286ab34280151c76a5a008 # v1.1.0
+        with:
+          slack-webhook-url: ${{ secrets.SLACK_WEBHOOK_URL_NOTIFICATIONS }}