Stronger typing in NaturalAbstractModelService

[PowerKiKi]

NaturalAbstractModelService.mapCreation() and other map* are loosely typed with unknown because the whole class is not aware of the entire graphql query. Instead it is only aware of a sub-part of the graphql query.

A potential solution is to refactor so that TCreate does not mean:

{
    id: 123,
    name: "foo"
}

but instead the whole query:

{
    createUser: {
        id: 123,
        name: "foo"
    }
}

And the the original TCreate meaning should be reproducible with something like https://stackoverflow.com/a/73278870/37706. This might also help to type keys (the "createUser"): https://www.typescriptlang.org/docs/handbook/2/template-literal-types.html#capitalizestringtype

So final usage would be:

- class UserService extends NaturalAbstractModelService<User['user'], UserVariables, Users['users'], UsersVariables, CreateUser['createUser'], CreateUserVariables, UpdateUser['updateUser'], UpdateUserVariables, any, any>
+ class UserService extends NaturalAbstractModelService<User, UserVariables, Users, UsersVariables, CreateUser, CreateUserVariables, UpdateUser, UpdateUserVariables, any, any>