chore(kafka): add kafka binding to example

Author: timonback

springwolf-examples/springwolf-kafka-example/src/main/java/io/github/stavshamir/springwolf/example/kafka/consumers/StringConsumer.java

@@ -3,6 +3,7 @@
 
 import io.github.stavshamir.springwolf.asyncapi.scanners.channels.operationdata.annotation.AsyncListener;
 import io.github.stavshamir.springwolf.asyncapi.scanners.channels.operationdata.annotation.AsyncOperation;
+import io.github.stavshamir.springwolf.asyncapi.scanners.channels.operationdata.annotation.KafkaAsyncOperationBinding;
 import io.github.stavshamir.springwolf.asyncapi.scanners.channels.payload.AsyncApiPayload;
 import io.swagger.v3.oas.annotations.media.Schema;
 import lombok.Data;
@@ -25,6 +26,7 @@ public class StringConsumer {
                             description =
                                     "Final classes (like String) can be documented using an envelope class and the @AsyncApiPayload annotation.",
                             payloadType = StringEnvelope.class))
+    @KafkaAsyncOperationBinding
     public void receiveStringPayload(String stringPayload) {
         log.info("Received new message in {}: {}", TOPIC, stringPayload);
     }

springwolf-examples/springwolf-kafka-example/src/test/resources/asyncapi.json

@@ -176,7 +176,11 @@
       "publish": {
         "operationId": "string-topic_publish",
         "description": "Final classes (like String) can be documented using an envelope class and the @AsyncApiPayload annotation.",
-        "bindings": { },
+        "bindings": {
+          "kafka": {
+            "bindingVersion": "0.4.0"
+          }
+        },
         "message": {
           "oneOf": [
             {
@@ -189,7 +193,11 @@
               "headers": {
                 "$ref": "#/components/schemas/HeadersNotDocumented"
               },
-              "bindings": { }
+              "bindings": {
+                "kafka": {
+                  "bindingVersion": "0.4.0"
+                }
+              }
             },
             {
               "schemaFormat": "application/vnd.oai.openapi+json;version=3.0.0",