Improvement of type descriptions

Currently type descriptions are limited to the exact type specified in the C++ code. (e.g. uint64_t). To improve readability, such types should be converted into plain English equivalents as in here https://loki-project.github.io/loki-docs/Developer/DaemonRPCGuide/

I would propose designing some kind of HashMap that converts C++ types to plain English strings and running all types through it to spit out the better description.