Feature Request: Add Support for stop Method in Kafka Consumer

Description

The stop method is currently not supported in the Confluent Kafka JavaScript client, as noted in the migration guide. The recommended workaround is to disconnect the consumer, but this approach has limitations in scenarios where pausing and resuming consumption is required without fully disconnecting.

Use Case

In our test suite, we need to:

1. Consume all existing messages from a topic.
2. Pause the consumer to produce new test messages.
3. Resume the consumer to consume only the newly produced messages.

Using disconnect as a workaround requires reinitializing the consumer and handling group rebalancing, which is both error-prone and inefficient. Similarly, pause and resume do not allow us to reconfigure the callback logic dynamically, as the run method cannot be called again after the consumer is already running.

Proposed Solution

• Allows pausing message consumption without fully disconnecting the consumer.
• Supports re-executing the run method to dynamically adjust the callback logic or reset the consumer's state.

Additional Context

• Migration Guide
• Current workaround: Disconnecting and reconnecting the consumer.
• Using pause and resume, which does not allow re-executing the run method to adjust callback logic dynamically.

Thank you for considering this feature request!