[Feature🚀] Implement GetConsumerConfigSubCommand for fetching consumer configuration

[mxsm]

Feature Description

Implement the getConsumerConfig command to retrieve consumer group subscription configuration from all brokers in the cluster.

Problem/Motivation

Administrators need to:

• View current consumer group configuration
• Verify subscription settings across cluster
• Compare configurations between brokers
• Debug configuration-related issues

Proposed Solution

// rocketmq-tools/src/commands/consumer/get_consumer_config.rs

pub struct GetConsumerConfigCommand {
    admin_ext: DefaultMQAdminExt,
}

impl GetConsumerConfigCommand {
    pub async fn execute(&self, opts: GetConsumerConfigOptions) -> Result<()> {
        // Get cluster info
        // Fetch subscription group config from each broker
        // Display formatted configuration
    }
}

pub struct GetConsumerConfigOptions {
    pub group_name: String,
    pub namesrv_addr: String,
}

pub struct ConsumerConfigInfo {
    pub cluster_name: String,
    pub broker_name: String,
    pub config: SubscriptionGroupConfig,
}

Alternatives

• Output in JSON/YAML format
• Support config comparison across brokers

Additional Context

• Java reference: GetConsumerConfigSubCommand.java
• Command name: getConsumerConfig
• Command description: "Get consumer config by subscription group name"

[EricZZZ]

I’d like to work on this issue.

[mxsm]

I’d like to work on this issue.

@EricZZZ Sure