type WritableDraft is not exported anywhere in dist, this causes build type declaration files with Draft finally fall back to raw and causing the type declaration exceeds max token length

[Jodo]

🐛 Bug Report

A clear and concise description of what the bug is.
When using Draft with object type in our code and build type declaration files from tsc, it will extract the T object type to raw object type because the WritableDraft is not exported from immer dist.

Link to repro

A bug report without a reproduction is not a bug report. Failing to follow this templately is likely to result in an immediate close & lock of the issue.

CodeSandbox link
Run pnpm run build-types to build type declarations to types folder

To Reproduce

Steps to reproduce the behavior:

1. import Draft type from immer
2. Write function with Draft type
3. Build type declaration for the .ts file

import type { Draft } from 'immer'

export interface A {
  a: number
}

export function draft<T>(t: T): Draft<T> {
  return t as Draft<T>
}

const a: A = {
  a: 1,
}

export const draftA = draft(a)

Observed behavior

The generated type declaration file is:

import type { Draft } from 'immer';
export interface A {
    a: number;
}
export declare function draft<T>(t: T): Draft<T>;
// Here it uses raw A definition, which can be very long
export declare const draftA: {
    a: number;
};

Expected behavior

import type { Draft, WritableDraft } from 'immer';
export interface A {
    a: number;
}
export declare function draft<T>(t: T): Draft<T>;
// Here it should be WritableDraft<A> instead of raw definition of type A
export declare const draftA: WritableDraft<A>;

Environment

immer@^10

• Immer version:
• I filed this report against the latest version of Immer