Feature request: Support schema annotation to enable simpleResolvers for a single object type.

[dickfickling]

We are running into performance issues with one of our models and would like to set simpleResolvers: true for just that model. I don't want to enable it globally because we use middleware / authorization on other models.

I think something like the following would work?

/// @TypeGraphQL.simpleResolvers(true)
model User {
  ...
}

Alternatives we've considered:

• Applying a patch on the generated model file won't work for us, because our models are generated into node_modules and therefore not included in source control, so there's no easy way for us to maintain the patch. Moving generated files into source control opens up a can of worms for us
• That's all we've considered