Add docs CI files (#331)

* Add docs CI files

* Edit toc

Author: theletterf

.github/workflows/docs-build.yml

@@ -0,0 +1,19 @@
+---
+name: docs-build
+
+on:
+  push:
+    branches:
+        - main
+  pull_request_target: ~
+
+jobs:
+  docs-preview:
+    uses: elastic/docs-builder/.github/workflows/preview-build.yml@main
+    with:
+      path-pattern: docs/**
+    permissions:
+      id-token: write
+      deployments: write
+      contents: read
+      pull-requests: write

.github/workflows/docs-cleanup.yml

@@ -0,0 +1,15 @@
+---
+name: docs-cleanup
+
+on:
+  pull_request_target:
+    types:
+      - closed
+
+jobs:
+  docs-preview:
+    uses: elastic/docs-builder/.github/workflows/preview-cleanup.yml@main
+    permissions:
+      contents: none
+      id-token: write
+      deployments: write

docs/release-notes/toc.yml

@@ -1,5 +1,5 @@
 toc:
   - file: index.md
-  # - file: known-issues.md
-  # - file: breaking-changes.md
-  # - file: deprecations.md
+  - hidden: known-issues.md
+  - hidden: breaking-changes.md
+  - hidden: deprecations.md