[C++ SDK] Consider converting high-level classes in iggy.hpp to rust-based enums

### Description

The current sdk does not create enums in rust and export them. Instead, it defines those in iggy.hpp and uses them to send strings across the ffi boundary. Consider adding enums to rust and exporting them to cpp side.

sub issue of #2100 

### Component

Other

### Proposed solution

_No response_

### Alternatives considered

_No response_