site: add search function

Signed-off-by: Xieql <xieqianglong@huawei.com>

docs/config.toml

@@ -79,3 +79,14 @@ copyright = "The Kurator Authors"
 	url = "https://groups.google.com/g/kurator-dev"
 	icon = "fa fa-envelope"
   desc = "Kyverno mailing list"
+
+# Google Custom Search Engine ID. Remove or comment out to disable search.
+#gcs_engine_id = "d72aa9b2712488cc3"
+# Enable Algolia DocSearch
+algolia_docsearch = false
+
+# Enable Lunr.js offline search
+offlineSearch = true 
+
+# Set to true to hide the sidebar search box (the top nav search box will still be displayed if search is enabled)
+sidebar_search_disable = false