Allow `infer function return type` refactor when return type are not imported

Suggestion

🔍 Search Terms

"infer function return type"

refactor

✅ Viability Checklist

My suggestion meets these guidelines:

• This wouldn't be a breaking change in existing TypeScript/JavaScript code
• This wouldn't change the runtime behavior of existing JavaScript code
• This could be implemented without emitting different JS based on the types of the expressions
• This isn't a runtime feature (e.g. library functionality, non-ECMAScript syntax with JavaScript output, new syntax sugar for JS, etc.)
• This feature would agree with the rest of TypeScript's Design Goals.

⭐ Suggestion

Infer function treturn type require all types used in return type are imported.
It takes a while to find which field is using a not imported type when returning many values as a object.

I want this refactor allowed by:

a. Auto import missing types
b. Show a message that tell user what is missing
c. Replace not imported type with unknown .

📃 Motivating Example

infer function return type refactor works when there is missing imports

💻 Use Cases

I'm extracting vue code to use composition api, with eslint rule @typescript-eslint/explicit-module-boundary-types enabled.
so i want use this refactor.

But infer function return type is not avaiable because some type not imported.

And i can not view all types because there is too many.

Inizia riproducendo il refactoring infer function return type con una funzione il cui oggetto restituito usa tipi che non sono importati. Esamina il comportamento esistente del refactoring e determina quale gestione proposta sia appropriata: importare automaticamente i tipi mancanti, segnalarli oppure sostituirli con unknown. Il lavoro è completato quando il refactoring ha un comportamento definito per gli import mancanti e una copertura per il caso alla base del problema.