Finish schema documentation
https://github.com/valueflows/vf-graphql/pull/69 made huge progress; now the input type documentation is to an equivalent standard to the query types, and that helps greatly since these are generally the first structs newcomers encounter in GraphQL playgrounds (they have to create data before they can query it!).
There are still some holes that it would be good to have coverage on:
- top-level query methods
- top-level mutations: mutation & parameter descriptions (only fields are currently documented, not types)
- input types (again, only fields are documented- not the structs themselves)