Consider supporting Mutiny

[sdelamo]

I think we should consider supporting Mutiny with a new module as we do for

• micronaut-reactor
• micronaut-rxjava3

Advantages:

• It would help us people Migrate or compare Quarkus applications to Micronaut applications.
• It would help people which use Hibernate Reactive which seems to be all-in with Mutiny.

[dstepanov]

Hibernate Reactive provides a two reactive APIs:

• Mutiny
• CompletionStage

Micronaut Data Hibernate Reactive is using only CompletionStage so no Mutiny dependency is needed

[msgilligan]

One nice thing about Mutiny is that it uses java.util.concurrent.Flow and eliminates the reactive-streams.org dependency.