Handle scoped package resolution from custom type roots

<details open="true">
<summary>
<h2><a href="https://github.com/tldraw/tldraw">tldraw/tldraw</a></h2>
</summary>

> **13 of 20 projects failed to build with the old tsc and were ignored**
> 
> ### [packages/vec/tsconfig.build.json](https://github.com/tldraw/tldraw/blob/a9f1a6ccc7bd5e7df6e251c16f7a5567bacbda38/packages/vec/tsconfig.build.json)
> * `error TS2688: Cannot find type definition file for '@testing-library/jest-dom'.`
>   
>   * Project Scope in [packages/vec/tsconfig.build.json](https://github.com/tldraw/tldraw/blob/a9f1a6ccc7bd5e7df6e251c16f7a5567bacbda38/packages/vec/tsconfig.build.json)
> * `error TS2688: Cannot find type definition file for '@testing-library/react'.`
>   
>   * Project Scope in [packages/vec/tsconfig.build.json](https://github.com/tldraw/tldraw/blob/a9f1a6ccc7bd5e7df6e251c16f7a5567bacbda38/packages/vec/tsconfig.build.json)
> 
> ### [packages/vec/tsconfig.dev.json](https://github.com/tldraw/tldraw/blob/a9f1a6ccc7bd5e7df6e251c16f7a5567bacbda38/packages/vec/tsconfig.dev.json)
> * `error TS2688: Cannot find type definition file for '@testing-library/jest-dom'.`
>   
>   * Project Scope in [packages/vec/tsconfig.dev.json](https://github.com/tldraw/tldraw/blob/a9f1a6ccc7bd5e7df6e251c16f7a5567bacbda38/packages/vec/tsconfig.dev.json)
> * `error TS2688: Cannot find type definition file for '@testing-library/react'.`
>   
>   * Project Scope in [packages/vec/tsconfig.dev.json](https://github.com/tldraw/tldraw/blob/a9f1a6ccc7bd5e7df6e251c16f7a5567bacbda38/packages/vec/tsconfig.dev.json)
> 
> ### [packages/intersect/tsconfig.build.json](https://github.com/tldraw/tldraw/blob/a9f1a6ccc7bd5e7df6e251c16f7a5567bacbda38/packages/intersect/tsconfig.build.json)
> * `error TS2688: Cannot find type definition file for '@testing-library/jest-dom'.`
>   
>   * Project Scope in [packages/vec/tsconfig.json](https://github.com/tldraw/tldraw/blob/a9f1a6ccc7bd5e7df6e251c16f7a5567bacbda38/packages/vec/tsconfig.json)
> * `error TS2688: Cannot find type definition file for '@testing-library/react'.`
>   
>   * Project Scope in [packages/vec/tsconfig.json](https://github.com/tldraw/tldraw/blob/a9f1a6ccc7bd5e7df6e251c16f7a5567bacbda38/packages/vec/tsconfig.json)
> 
> ### [packages/intersect/tsconfig.dev.json](https://github.com/tldraw/tldraw/blob/a9f1a6ccc7bd5e7df6e251c16f7a5567bacbda38/packages/intersect/tsconfig.dev.json)
> * `error TS2688: Cannot find type definition file for '@testing-library/jest-dom'.`
>   
>   * Project Scope in [packages/vec/tsconfig.json](https://github.com/tldraw/tldraw/blob/a9f1a6ccc7bd5e7df6e251c16f7a5567bacbda38/packages/vec/tsconfig.json)
> * `error TS2688: Cannot find type definition file for '@testing-library/react'.`
>   
>   * Project Scope in [packages/vec/tsconfig.json](https://github.com/tldraw/tldraw/blob/a9f1a6ccc7bd5e7df6e251c16f7a5567bacbda38/packages/vec/tsconfig.json)
> 
> ### [packages/curve/tsconfig.build.json](https://github.com/tldraw/tldraw/blob/a9f1a6ccc7bd5e7df6e251c16f7a5567bacbda38/packages/curve/tsconfig.build.json)
> * `error TS2688: Cannot find type definition file for '@testing-library/jest-dom'.`
>   
>   * Project Scope in [packages/curve/tsconfig.build.json](https://github.com/tldraw/tldraw/blob/a9f1a6ccc7bd5e7df6e251c16f7a5567bacbda38/packages/curve/tsconfig.build.json)
> * `error TS2688: Cannot find type definition file for '@testing-library/react'.`
>   
>   * Project Scope in [packages/curve/tsconfig.build.json](https://github.com/tldraw/tldraw/blob/a9f1a6ccc7bd5e7df6e251c16f7a5567bacbda38/packages/curve/tsconfig.build.json)
> 
> ### [packages/curve/tsconfig.dev.json](https://github.com/tldraw/tldraw/blob/a9f1a6ccc7bd5e7df6e251c16f7a5567bacbda38/packages/curve/tsconfig.dev.json)
> * `error TS2688: Cannot find type definition file for '@testing-library/jest-dom'.`
>   
>   * Project Scope in [packages/curve/tsconfig.dev.json](https://github.com/tldraw/tldraw/blob/a9f1a6ccc7bd5e7df6e251c16f7a5567bacbda38/packages/curve/tsconfig.dev.json)
> * `error TS2688: Cannot find type definition file for '@testing-library/react'.`
>   
>   * Project Scope in [packages/curve/tsconfig.dev.json](https://github.com/tldraw/tldraw/blob/a9f1a6ccc7bd5e7df6e251c16f7a5567bacbda38/packages/curve/tsconfig.dev.json)
> 
> ### [packages/curve/tsconfig.json](https://github.com/tldraw/tldraw/blob/a9f1a6ccc7bd5e7df6e251c16f7a5567bacbda38/packages/curve/tsconfig.json)
> * `error TS2688: Cannot find type definition file for '@testing-library/jest-dom'.`
>   
>   * Project Scope in [packages/curve/tsconfig.json](https://github.com/tldraw/tldraw/blob/a9f1a6ccc7bd5e7df6e251c16f7a5567bacbda38/packages/curve/tsconfig.json)
> * `error TS2688: Cannot find type definition file for '@testing-library/react'.`
>   
>   * Project Scope in [packages/curve/tsconfig.json](https://github.com/tldraw/tldraw/blob/a9f1a6ccc7bd5e7df6e251c16f7a5567bacbda38/packages/curve/tsconfig.json)

</details>

This one needs further fixing. If looking into `node_modules/@types` we need to handle scoped package names. 


![image](https://user-images.githubusercontent.com/8052792/223579503-75b4097d-5320-4b32-be2b-d07287d114cd.png)

_Originally posted by @sheetalkamat in https://github.com/microsoft/TypeScript/issues/53122#issuecomment-1459027285_
            

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Handle scoped package resolution from custom type roots #53154

tldraw/tldraw

packages/vec/tsconfig.build.json

packages/vec/tsconfig.dev.json

packages/intersect/tsconfig.build.json

packages/intersect/tsconfig.dev.json

packages/curve/tsconfig.build.json

packages/curve/tsconfig.dev.json

packages/curve/tsconfig.json

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Handle scoped package resolution from custom type roots #53154

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