Provide client side intégration to Kafka with Dekaf

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Is your feature request related to a problem? Please describe the problem.

Current Kafka intégration rely on Confluent.Kafka that itself rely on librdkafka using interop.
Dekaf is a pure .NET library implementing Kafka protocol client side and introduced 1/1 compatibility mapping with Confluent.Kafka api and config objects.
See https://github.com/thomhurst/Dekaf/issues/2317

### Describe the solution you'd like

An alternative client side intégration that use Dekaf.

### Additional context

_No response_

Start by locating Aspire's existing Confluent.Kafka integration and review Dekaf's compatibility mapping, including issue 2317. Determine the integration entry points, configuration surface, and expected client behavior; done means Aspire offers a documented Dekaf-based alternative without relying on librdkafka.

Written by the indexing model from the issue text.