Normal queries should use data field #2

Hey Oded!
You have provided a really nice and useful example. Thank you for that!

However, I think you have an error in the RepositorySchema class. When doing a normal query (not introspection), we need to return the data under the a field called "data", just like we do in the Introspection case. See response examples at https://graphql.org/learn/queries/

This is the line that outputs the data without the data field:

I'll make you a PR unless you have a different opinion on the issue.