This commit introduces a Koin module, `clusterNetworkModule`, to provide instances for network-related dependencies for the clustering feature.
Specifically, it provides:
- An `OkHttpClient` instance with a 5-second connection timeout.
- A `Retrofit` instance configured with a base URL ("http://labai.polinema.ac.id:5050/"), the provided `OkHttpClient`, and `GsonConverterFactory`.
- A `ClusteringService` instance created by the `Retrofit` instance.
This commit introduces the `ClusteringService` interface.
This interface defines a suspend function `getRecommendations` to fetch clustering recommendations from the "api/data" endpoint. It is expected to return a list of `ClusteringResponse` objects.
