Add generated code to the TS query file itself

[aspirisen]

Description

It would be very useful if Codegen could append the generated code directly to the file where the query is defined, instead of creating a separate file for the generated types.

Example

Consider the following example. I have a file named my.graphql.ts with the following content:

gql`
  query hello {
    user {
      name
      email
    }
  }
`;

When I run Codegen, it would be great if the generated code could be appended to the end of this file, with a special comment indicating which part of the code is generated. This would help ensure that subsequent generations know which code to replace, without overwriting any custom code that developers might add around the query.

Benefit

This approach would help us avoid the need for additional files just to store generated types