DataStore example should support more than just single model and filtering

[wtrocki]

Feature Request

In early versions of the offix we made mistake that we have been using example app that was too simple. Before we do official release we need to test how example app will work with multiple models - comments.

While I see that we have separate per model store, but actual hooks implementation we have will simply not work to fetch data if they rely on results from previous query (hooks need to be lazy etc.)

[kingsleyzissou]

@Eunovo

[wtrocki]

Creating another model to fully test replication use cases.