docs(spring-kafka-example): add initial README

Author: igorcampos-dev

spring-kafka-example/README.md

@@ -0,0 +1,25 @@
+# spring-example-kafka
+
+---
+
+## Overview
+
+Basic Java Spring (Java 21) project showing simple integration with Apache Kafka.  
+Includes a Kafka producer and consumer with minimal setup for local development.
+
+---
+
+## Tech stack
+
+- Spring Boot
+- Java 21
+- Kafka (Docker)
+
+---
+
+## Related Resources
+
+| Description                                      | Link                                                                                                       |
+|--------------------------------------------------|------------------------------------------------------------------------------------------------------------|
+| Spring Kafka Official Docs                       | [spring.io/projects/spring-kafka](https://spring.io/projects/spring-kafka)                                 |
+| Various Kafka setups and approaches using Docker | [github.com/conduktor/kafka-stack-docker-compose](https://github.com/conduktor/kafka-stack-docker-compose) |