Add more models

[guenth39]

Is your feature request related to a problem? Please describe.

I miss the known type safety by missing models for SearchParameters and SearchResponse, a map is always not as easy to use and more error prone than a model.

Describe the solution you'd like

Add the models for SearchParameters and SearchResponse.

[happy-san]

Hi @guenth39
Thank you for creating this issue. I've had this on my TODO list for a while now, just haven't gotten around to implement it due to time limitations.
I can definitely guide you if you feel like contributing to the project.

[kishorenc]

These model definitions are available as part of the open api spec and that can be used to generate the models.