Feature Request: Make schema.gql optional

[davidsparkles]

Package

• [ ] auth
• [ ] boot-loader / graceful-shutdown
• [ ] config
• [ ] db
• [ ] events
• [ ] file-storage
• [ ] graphql
• [ ] notifications
• [ ] queue
• [x] schema-builder
• [ ] server

Description / Use Case for a Feature

An empty schema.gql should not be required to make the framework start. The framework currently fails because type Mutation is inserted into the complete SDL but does not hold any mutation.

extend type Mutation {

  """
  Some Mutation
  """
  someMutation: String! @custom(resolver: "someMutation")
}

extend type Query {

  """
  Some Query
  """
  someQuery: String! @custom(resolver: "someQuery")

}