[Feature] Provide a method to get MaxOffset/TopicStatsTable

[dovics]

FEATURE REQUEST

1. Please describe the feature you are requesting.

there is no way To obtain the MaxOffset of a Topic, is it possible to also provide methods such as TopicStatsTable in the Go SDK.

https://github.com/apache/rocketmq/blob/280804c5592341f92a43b6d72ec6e94db77b74ac/remoting/src/main/java/org/apache/rocketmq/remoting/protocol/admin/TopicStatsTable.java#L24

public class TopicStatsTable extends RemotingSerializable {
    private Map<MessageQueue, TopicOffset> offsetTable = new ConcurrentHashMap<>();

    public Map<MessageQueue, TopicOffset> getOffsetTable() {
        return offsetTable;
    }

    public void setOffsetTable(Map<MessageQueue, TopicOffset> offsetTable) {
        this.offsetTable = offsetTable;
    }
}

2. Provide any additional detail on your proposed use case for this feature.

I am developing a KEDA Scaler based on RocketMQ, which will dynamically adjust the number of Pods based on the difference between the ConsumerGroup Offset and the Topic MaxOffset. I can get the ConsumerGroup Offset through the PullConsumer.CurrentOffset method, But I also need a method to get MaxOffset.

2. Indicate the importance of this issue to you (blocker, must-have, should-have, nice-to-have). Are you currently using any workarounds to address this issue?

blocker

4. If there are some sub-tasks using -[] for each subtask and create a corresponding issue to map to the sub task:

None