Can we add support for jsoniter?

[filosganga]

jsoniter is a macro-based blazing fast JSON library.

As far as I know jsoniter does not use an intermediate ADT, that is required for the JSONPath to work. I see varius of options:

• Reuse the circe ADT. It is easy as we have already the support for circe, but people is forced to have the circe dependency
• Define an internal ADT and all the implementations will be converted from and to this ADT. It will make the circe implementation slower because of the double conversion
• Have an ADT only for the implementation that does not have one. Best of both but not sure how feasible it is.