Add docs

Author: carlosdelest

docs/reference/esql/functions/kibana/definition/match.json

@@ -16,6 +16,7 @@ Boolean operators for comparing against one or multiple expressions.
 * <<esql-in-operator>>
 * <<esql-like-operator>>
 * <<esql-rlike-operator>>
+* experimental:[] <<esql-search-operators>>
 // end::op_list[]
 
 include::binary.asciidoc[]
@@ -26,3 +27,4 @@ include::cast.asciidoc[]
 include::in.asciidoc[]
 include::like.asciidoc[]
 include::rlike.asciidoc[]
+include::search.asciidoc[]

docs/reference/esql/functions/kibana/docs/match.md

@@ -0,0 +1,14 @@
+[discrete]
+[[esql-search-operators]]
+=== Search operators
+
+The only search operator is match (`:`):
+
+preview::["Do not use on production environments. This functionality is in technical preview and may be changed or removed in a future release. Elastic will work to fix any issues, but features in technical preview are not subject to the support SLA of official GA features."]
+
+[.text-center]
+image::esql/functions/signature/match_operator.svg[Embedded,opts=inline]
+
+Supported types:
+
+include::types/match.asciidoc[]