Greenfield notes

[rmosolgo]

I have the chance to write a greenfield GraphQL API for the first time in ... a while. I'm keeping notes on things to improve:

• Generate dataload_association fields for belongs_to associations
• Generate connections for has_many associations
• Add example resolve_type implementation in a comment?
• Make global_id_field default to :id?
• Default objects as implements Types::NodeType
• Don't auto-generate passwordDigest 🙄