Add super stream producer

[Gsantomaggio]

SuperStreamProducer

---

New struct to create the super stream producer:

The main features are:

• RoutingStrategy interface

• HashRoutingStrategy struct

• KeyRoutingStrategy struct

• SuperStreamProducer struct

• PartitionContext struct

Example:

      superStreamProducer, err := env.NewSuperStreamProducer(superStreamName,
        stream.NewSuperStreamProducerOptions(
            stream.NewHashRoutingMurmurStrategy(func(message message.StreamMessage) string {
                return message.GetApplicationProperties()["myKey"].(string)
            })).SetClientProvidedName("my-superStreamProducer"))
    CheckErr(err)

Here the full code example

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 89.18919% with 32 lines in your changes are missing coverage. Please review.

Project coverage is 83.79%. Comparing base (34fd584) to head (1c042cb).

Files	Patch %	Lines
pkg/stream/super_stream_producer.go	87.35%	13 Missing and 9 partials :warning:
pkg/stream/environment.go	71.42%	3 Missing and 3 partials :warning:
pkg/stream/client.go	93.33%	1 Missing and 1 partial :warning:
pkg/stream/producer.go	77.77%	1 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #288 +/- ## ========================================== + Coverage 83.43% 83.79% +0.36% ========================================== Files 24 25 +1 Lines 3350 3610 +260 ========================================== + Hits 2795 3025 +230 - Misses 402 419 +17 - Partials 153 166 +13 ```

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[Gsantomaggio]

Will merge after pairing with @DanielePalaia