SDL-based scaffolding: yoga scaffold my-schema.graphql

[schickling]

GraphQL SDL provides a very convenient way to define your GraphQL schema – especially when starting out with a new project. I think it could be interesting for Yoga to allow a "schema-first" scaffolding workflow by running yoga scaffold my-schema.graphql.

[wtrocki]

+💯 for this. Mentoned that couple times on other issues. This will enable smooth migration path. There will be couple corner cases here like when schema reffers to unknow scallars etc. but basic stuff should work almost out of the box.

[tgriesser]

Still WIP but putting something together around this in Nexus - https://nexus.js.org/converter