Add auto-configuration for JdbcClient

Closes gh-36579

spring-boot-project/spring-boot-docs/src/docs/asciidoc/data/sql.adoc

@@ -1,6 +1,6 @@
 [[data.sql]]
 == SQL Databases
-The {spring-framework}[Spring Framework] provides extensive support for working with SQL databases, from direct JDBC access using `JdbcTemplate` to complete "`object relational mapping`" technologies such as Hibernate.
+The {spring-framework}[Spring Framework] provides extensive support for working with SQL databases, from direct JDBC access using `JdbcClient` or `JdbcTemplate` to complete "`object relational mapping`" technologies such as Hibernate.
 {spring-data}[Spring Data] provides an additional level of functionality: creating `Repository` implementations directly from interfaces and using conventions to generate queries from your method names.
 
 
@@ -176,6 +176,17 @@ If more than one `JdbcTemplate` is defined and no primary candidate exists, the
 
 
 
+[[data.sql.jdbc-client]]
+=== Using JdbcClient
+Spring's `JdbcClient` is auto-configured based on the presence of a `NamedParameterJdbcTemplate`.
+You can inject it directly in your own beans as well, as shown in the following example:
+
+include::code:MyBean[]
+
+If you rely on auto-configuration to create the underlying `JdbcTemplate`, any customization using `spring.jdbc.template.*` properties are taken into account in the client as well.
+
+
+
 [[data.sql.jpa-and-spring-data]]
 === JPA and Spring Data JPA
 The Java Persistence API is a standard technology that lets you "`map`" objects to relational databases.

spring-boot-project/spring-boot-docs/src/docs/asciidoc/howto/data-initialization.adoc

@@ -217,6 +217,7 @@ Spring Boot will automatically detect beans of the following types that depends
 - `AbstractEntityManagerFactoryBean` (unless configprop:spring.jpa.defer-datasource-initialization[] is set to `true`)
 - `DSLContext` (jOOQ)
 - `EntityManagerFactory` (unless configprop:spring.jpa.defer-datasource-initialization[] is set to `true`)
+- `JdbcClient`
 - `JdbcOperations`
 - `NamedParameterJdbcOperations`