Add Kubernetes rabbitMQ Recipe - Bicep

Overview of the Resource type and Recipe

Radius.Messaging/rabbitMQ only has an Azure recipe today (Service Bus, via the AKS recipe pack). Create a Kubernetes Recipe in Bicep.

Acceptance criteria

1. A Kubernetes Bicep recipe at Messaging/rabbitMQ/recipes/kubernetes/bicep/ (official rabbitmq image: Deployment + Service) mapping queue.
2. Emits the Radius result object with the resource type's outputs.
3. Recipe entry added to the default Kubernetes recipe pack (recipepack/kubernetes/default-recipepack.bicep) and wired into the publish-bicep-recipes workflow matrix.
4. README; manual testing with make test-recipe.

Additional context

Example: Data/postgreSqlDatabases/recipes/kubernetes/bicep/; contribution guide docs/contributing/contributing-resource-types-recipes.md.