remove search in reference section and redirect

redirects.yml

@@ -193,6 +193,8 @@ redirects:
   'solutions/observability/apps/inspect-uptime-duration-anomalies.md': 'solutions/observability/uptime/inspect-duration-anomalies.md'
   'solutions/observability/apps/configure-settings.md': 'solutions/observability/uptime/configure-settings.md'
   'solutions/observability/apps/tutorial-monitor-java-application.md': 'solutions/observability/applications/tutorial-monitor-java-application.md'
+  # we can't redirect to the search-ui book so this is the next best option
+  'reference/search/index.md': 'reference/index.md'
 
 # Related to https://github.com/elastic/docs-content/pull/1108
   'troubleshoot/elasticsearch/elasticsearch-client-java-api-client/apache-errors.md': 'troubleshoot/elasticsearch/clients.md'
@@ -209,4 +211,4 @@ redirects:
   'troubleshoot/elasticsearch/elasticsearch-client-net-api/logging-with-onrequestcompleted.md': 'troubleshoot/elasticsearch/clients.md'
   'troubleshoot/elasticsearch/elasticsearch-client-net-api/logging.md': 'troubleshoot/elasticsearch/clients.md'
   'troubleshoot/elasticsearch/elasticsearch-client-net-api/net.md': 'troubleshoot/elasticsearch/clients.md'
-  'troubleshoot/elasticsearch/elasticsearch-client-ruby-api/ruby.md': 'troubleshoot/elasticsearch/clients.md'
+  'troubleshoot/elasticsearch/elasticsearch-client-ruby-api/ruby.md': 'troubleshoot/elasticsearch/clients.md'

reference/index.md

@@ -30,12 +30,6 @@
 
 **Learn more in [Observability](observability/index.md)**
 
-## Search UI
-
-Explore reference content on Search UI and how you can develop fast, modern, and engaging search experiences.
-
-**Learn more in [Search UI](search-ui://reference/index.md)**
-
 ## Elasticsearch and index management
 
 Customize your Elastic Stack setup with our configuration reference guides. Explore JVM settings, client documentation, Elasticsearch privileges, and index lifecycle actions to find the detailed information you need to configure your environment to your specific needs.
@@ -84,6 +78,12 @@
 
 **Learn more in [ECS](ecs://reference/index.md)**
 
+## Search UI library
+
+Explore reference content on the Search UI library and how you can develop fast, modern, and engaging search experiences.
+
+**Learn more in [Search UI](search-ui://reference/search-ui/index.md)**
+
 ## Cloud
 
 Leverage the power of the cloud with Elastic Cloud solutions. Explore Elastic Cloud on Kubernetes, Elastic Cloud Enterprise, and Elastic Cloud Hosted to scale your operations.