chore: add Haystack Enterprise Components docs page (#11793)

Co-authored-by: Julian Risch <julian.risch@deepset.ai>
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: 3 people

.github/workflows/update-platform-components.yml

@@ -0,0 +1,99 @@
+name: Update Platform Components Table
+
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+concurrency:
+  group: update-platform-components
+  cancel-in-progress: false
+
+env:
+  PYTHON_VERSION: "3.11"
+  OUTPUT_FILE: docs-website/docs/overview/platform-components.mdx
+
+permissions:
+  contents: read
+
+jobs:
+  update:
+    runs-on: ubuntu-slim
+
+    steps:
+      - name: Checkout deepset-ai/haystack
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
+        with:
+          token: ${{ secrets.HAYSTACK_BOT_TOKEN }}
+          # Full history so git diff against HEAD works correctly
+          fetch-depth: 0
+
+      - name: Checkout deepset-ai/haystack-core-integrations
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
+        with:
+          repository: deepset-ai/haystack-core-integrations
+          path: haystack-core-integrations
+          fetch-depth: 1
+          sparse-checkout: integrations
+          sparse-checkout-cone-mode: true
+
+      - name: Checkout platform repo (sparse — schema file only)
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
+        with:
+          repository: ${{ secrets.SCHEMA_REPO }}
+          token: ${{ secrets.PLATFORM_REPO_PAT }}
+          path: platform-repo
+          sparse-checkout: |
+            ${{ secrets.SCHEMA_REPO_PATH }}
+          sparse-checkout-cone-mode: false
+
+      - name: Set up Python ${{ env.PYTHON_VERSION }}
+        uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
+        with:
+          python-version: "${{ env.PYTHON_VERSION }}"
+
+      - name: Generate platform components table
+        run: |
+          python scripts/generate_platform_components_table.py \
+            --haystack-src . \
+            --integrations-src ./haystack-core-integrations \
+            --schema ./platform-repo/${{ secrets.SCHEMA_REPO_PATH }} \
+            --output ./${{ env.OUTPUT_FILE }}
+
+      - name: Compute PR body
+        id: pr_body
+        run: |
+          FILE="${{ env.OUTPUT_FILE }}"
+          if git ls-files --error-unmatch "$FILE" 2>/dev/null; then
+            ADDED=$(git diff HEAD -- "$FILE" | grep -cE '^\+\| `' || true)
+            REMOVED=$(git diff HEAD -- "$FILE" | grep -cE '^\-\| `' || true)
+            SUMMARY="Component rows changed: **+${ADDED}** added, **-${REMOVED}** removed."
+          else
+            SUMMARY="Initial generation of the platform components table."
+          fi
+
+          {
+            echo "body<<EOF"
+            echo "## Platform Components Table Update"
+            echo ""
+            echo "${SUMMARY}"
+            echo ""
+            echo "_Auto-generated by the [update-platform-components](https://github.com/deepset-ai/haystack/actions/workflows/update-platform-components.yml) workflow._"
+            echo "EOF"
+          } >> "$GITHUB_OUTPUT"
+
+      - name: Open or update pull request
+        uses: peter-evans/create-pull-request@5f6978faf089d4d20b00c7766989d076bb2fc7f1 # v8.1.1
+        with:
+          token: ${{ secrets.HAYSTACK_BOT_TOKEN }}
+          commit-message: "chore: update platform components table [skip ci]"
+          branch: chore/update-platform-components
+          base: main
+          title: "chore: update platform components table"
+          add-paths: |
+            ${{ env.OUTPUT_FILE }}
+          body: ${{ steps.pr_body.outputs.body }}
+          labels: |
+            documentation
+            ignore-for-release-notes