Issue: Does not resolve imports via index.ts exports

[Anxhul10]

Description

ffdeptree fails to resolve imports when they rely on re-exports via an index.ts file — particularly when using export { ... as default } or other re-export styles. It works fine when importing directly from the file, but not when the symbol is re-exported and then imported indirectly.

steps to reproduce

File structure:

root/
├── folderA/
│   └── index.ts
├── folderB/
│   ├── add.ts
│   └── index.ts

Contents:

folderB/add.ts

const  add = (a: number, b: number) => {
  return a + b;
}
export default add

folderB/index.ts

export { add as default } from './add';

folderA/index.ts

import { add } from '../folderB'; // ❌ This fails
// import { add  } from '../folderB/add.ts'; // ✅ This  works