Improvement: better sdl management

[chrisvdm]

Create Yoga GraphQL plugin to manage sdl. Pass plugin to extraPlugins on createGraphQLHandler (api/src/functions/graphql.js)

Plugin specs:

• Use Stripe's openapi to generate sdl
  • Should allow to create custom queries
  • Should allow to create custom types. e.g. StripeItem
  • Should generate to observable files
• Use Github actions to update sdl when openapi gets updated
• Host Schema online

more information on problem here: https://github.com/chrisvdm/redwoodjs-stripe/issues/72) more on openapi: https://github.com/chrisvdm/redwoodjs-stripe/issues/63 https://github.com/graphql/graphiql

• Subject to change