[REQ] [typescript-*] add flag to don't convertation some types

Hello!
I partially use your wonderful tool to generate types for redux-toolkit-query. More details can be found here:
https://github.com/rtk-incubator/rtk-query-codegen/issues/63#issuecomment-879219548

However, when the API changes, I have to compare the new generated files with the old ones.
For example, since Redux prefers to store serializable data, I need to rewrite the generated date to string types, and then I need to rewrite some functions that convert strings to dates.
From:

interface Car {
  id: string;
  yearOfManufacture: Date;
}
function CarFromJSON(json: any): Car {
  return {
    id: json['id'],
    yearOfManufacture: new Date(json['year_of_manufacture']),
  };
}

To:

interface Car {
  id: string;
  yearOfManufacture: string;
}
function CarFromJSON(json: any): Car {
  return {
    id: json['id'],
    yearOfManufacture: json['year_of_manufacture'],
  };
}

So...
With each new iteration, the number of models grows, and such differences between the generated types and the actual ones remain. This makes Diff very difficult.

What I suggest:
Perhaps there is a way to make the generator behavior customizable? For example for data serializability.

Start by reviewing the TypeScript generator entry points and the linked RTK Query discussion. Define the configuration needed to keep selected generated types serializable and identify how the corresponding conversion functions should change; done means the behavior is configurable without manually rewriting generated models.