Respect engineStrict setting in package.json to fix Node.js version

[wottpal]

What is the problem this feature would solve?

Currently, we have specified Node.js 20 in the engines field in our package.json. But in practice, you don't notice at all if a different Node.js version is active on a system during bun run and bunx commands (which default to use Node.js w/o --bun). This regularly causes issues (a) across our team and (b) with the CI.

What is the feature you are proposing to solve the problem?

There already is the engineStrict boolean flag specified for package.json's. I would suggest bun (install|run|exec|…) to follow this rule and fail if node is running on a different version than specified.

What alternatives have you considered?

No response