Feature- Consumer.NegativeAcknowledge

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

Hi @blankensteiner,
I'm working with Apache Pulsar and using DotPulsar for my messaging needs. I require the NegativeAcknowledge feature, but for now, I'm using RedeliverUnacknowledgedMessages(List) as a workaround. Is there any plan to include this feature in an upcoming release?

Thank You!!!

### Describe the solution you'd like and alternatives you've considered

require feature - Consumer.NegativeAcknowledge(MessageId)

The issue requests Consumer.NegativeAcknowledge(MessageId), with RedeliverUnacknowledgedMessages(List) currently used as a workaround. Start by locating the consumer API and its message-acknowledgement implementation in this repository, then review existing tests for consumer acknowledgement behavior. Done means the requested method is supported and covered by tests.

Written by the indexing model from the issue text.