Replace checkstyle plugin

[Haarolean]

We require a viable solution to fix the checkstyle errors right in IDE. Currently you have to compile and visit each class present in logs.
This should work something like eslint/prettier with visual indication of invalidly formatted lines.

[Haarolean]

https://github.com/palantir/palantir-java-format?tab=readme-ov-file

• spotless plugin to enforce in CI

[Haarolean]

current checkstyle plugin doesn't care about formatting like this:

  public Mono<Void> deleteConsumerGroupOffset(KafkaCluster cluster,
                                            String groupId,
                                              String topicName) {
    return adminClientService.get(cluster)
        .flatMap(adminClient -> adminClient.deleteConsumerGroupOffsets(groupId, topicName));
  }