hipo::get template always returns double

auto px = particleBank.get("px", row); // type is `double`, even though px is `float` in the schema
auto px = particleBank.get<float>("px", row); // still appears to be a `double`

This is because the default type in template<typename T = double> T get is set to double, to give the compiler a "default", but that's not the correct thing to do here. We need to fix the type deduction here, but the types are stored in hipo::Type, an enumerator: https://github.com/gavalian/hipo/blob/9122a657f09c664a9f9d5615072959d317e7ed41/hipo4/dictionary.h#L36-L43

I tried something based on https://stackoverflow.com/a/58622942 but I was unsuccessful, since I need bankSchema in the trailing return type (to lookup the type), but bankSchema is not static; I was also not successful simply declaring bankSchema as static, since parameter item seems to not be accessible in the trailing return type.

After a few hours trying to resolve this, it's time to ask ChatGPT 😃

Alternatively, give up and remove these templated get methods (whereas the templated put seems to work fine, since the type is deduced by the parameter type).