Add Scaffold Generator - Generates pkg from model with full CRUD + GraphQL types + Resolvers

[josemarluedke]

Example output:

$ tiger g scaffold ./pkg/models/partner_members.go
Created:
  pkg/partnerMembers/create.go
  pkg/partnerMembers/create_test.go
  pkg/partnerMembers/delete.go
  pkg/partnerMembers/delete_test.go
  pkg/partnerMembers/partnerMembers_suite_test.go
  pkg/partnerMembers/schema.graphql
  pkg/partnerMembers/service.go
  pkg/partnerMembers/service_test.go
  pkg/partnerMembers/update.go
  pkg/partnerMembers/update_test.go
  tests/factories/partner_member.go
  pkg/resolvers/partner_member.go
Modified:
  pkg/schemas/query.graphql
  pkg/schemas/mutation.graphql


What's Next?
  Manually Register the Service in pkg/resolvers/service_registry.go
  Fix TODOs
  Implement Access Management
  Review generated GraphQL:
    - Remove any undesired field
    - Use graphql type for foreign key fields if any