Create a Quarkus GraphQL example app

[beikov]

Quarkus has a GraphQL extension and I'd like to have a sample application and maybe a blog post about the use of GraphQL with Entity-Views. I hope that our existing integration works. If not, it should be adapted.

[minhdtb]

@beikov yeah, I really need Quarkus graphql example by using smallrye-graphql. Hope you add it soon