Describe the bug

npm shim (running $HOME/.vite-plus/bin/npm) does not consult packageManager field. This is confusing. While node --version will properly print the version, which respect .node-version. npm --version will use resolved Node.js npm version not the one specified in packageManager field.

Steps to reproduce

1. Install [email protected]: npm i -g [email protected].
2. Set packageManager field to [email protected]: npm pkg set [email protected]
3. Run vp install -- --verbose and then npm --version.

Expected:
Both commands should respect packageManager field. They both should print 11.14.0.

Actual:
vp install -- --verbose prints npm info using [email protected], which is expected, but npm --version print 11.14.1, which is confusing.

System Info

`vp v0.1.21`

`which npm` is `$HOME/.vite-plus/bin/npm`

Used Package Manager

npm

Validations

• Read the Contributing Guidelines.
• Check that there isn't already an issue for the same bug.
• Confirm this is a Vite+ issue and not an upstream issue (Vite, Vitest, tsdown, Rolldown, or Oxc).
• The provided reproduction is a minimal reproducible example.