Determine scope of the nerdgraph schema marshaling.

[zlesnr]

Feature Description

Currently, a good portion of the nerdgraph schema is being read using this package.

https://github.com/newrelic/newrelic-client-go/tree/master/tools/typegen

We'd like to know which data types are not handled by that code yet. This list is to be used to generate further work, and perhaps steer where we go next, or where we choose not to go next.

A simple table somewhere that represents the total scope, compared to which have been fully implemented, or which need a little more love.

[zlesnr]

Everything we've needed so far has been implemented. Further requirements will be written up in a new issue.