Add support for CBOR codecs in RSocket

This commit auto-configures CBOR (see https://cbor.io/) codecs in the
RSocketStrategies, using Jackson binary format support.

The required dependency is added to the rsocket starter. Binary codecs
are well suited for RSocket payloads, so this codec is added first to
the list of codecs (before the JSON one already supported).

Closes gh-16830

spring-boot-project/spring-boot-docs/pom.xml

@@ -135,6 +135,11 @@
 			<artifactId>jackson-datatype-joda</artifactId>
 			<optional>true</optional>
 		</dependency>
+		<dependency>
+			<groupId>com.fasterxml.jackson.dataformat</groupId>
+			<artifactId>jackson-dataformat-cbor</artifactId>
+			<optional>true</optional>
+		</dependency>
 		<dependency>
 			<groupId>com.fasterxml.jackson.dataformat</groupId>
 			<artifactId>jackson-dataformat-xml</artifactId>