Missing sass-embedded peer dependency

[rtritto]

Link to the code that reproduces this issue

https://codesandbox.io/p/devbox/gracious-voice-8mxdxl?workspaceId=eb53ed51-e5b9-4293-8298-f0747af5ed78

To Reproduce

1. create-next-app
2. add sass-embedded
3. create a .scss file and import
4. next dev

Current vs. Expected behavior

Current

next tried to access sass (a peer dependency) but it isn't provided by its ancestors; this makes the require call ambiguous and unsound.

Required package: sass
Required by: next@npm:14.2.8 (via C:\<WORKSPACE>\node_modules\next\dist\compiled\sass-loader\)

To use Next.js' built-in Sass support, you first need to install `sass`.
Run `npm i sass` or `yarn add sass` inside your workspace.

Learn more: https://nextjs.org/docs/messages/install-sass

Expected:

No error and sass-embedded ia an optiona peer dependency

Provide environment information

Operating System:
  Platform: win32
  Arch: x64
  Version: Windows 11 Home
  Available memory (MB): 32510
  Available CPU cores: 16
Binaries:
  Node: 22.3.0
  npm: N/A
  Yarn: N/A
  pnpm: N/A
Relevant Packages:
  next: 14.2.8 // There is a newer version (14.2.10) available, upgrade recommended!
  eslint-config-next: 14.2.8
  react: 18.3.1
  react-dom: 18.3.1
  typescript: 5.5.4
Next.js Config:
  output: N/A
 ⚠ There is a newer version (14.2.10) available, upgrade recommended!
   Please try the latest canary version (`npm install next@canary`) to confirm the issue still exists before creating a new issue.
   Read more - https://nextjs.org/docs/messages/opening-an-issue

Which area(s) are affected? (Select all that apply)

create-next-app, Runtime, Webpack

Which stage(s) are affected? (Select all that apply)

next dev (local)

Additional context

sass-embedded support is already added in #64577 (discussion #36160)