create a new C++ port of jsonata

[u19809]

Hi,

I needed support for QJsonValue objects but the jsonata-cpp port did only support nlohmann.

When adding support it modified the code such that my version supports any backend. The backend is templated so that you can easily add other backends

I implemented bridges for
nlohmann::ordered_json
nlohmann:json
QJsonValue
QVariant

How can I publish this port of jsonata ? ( the repository is here https://github.com/u19809/QJsonata)