[Feat]: error if unsafe-perm not set when installing with npm

[jsjoeio]

What is your suggestion?

Error if you are root and you don't pass --unsafe-perm

Why do you want this feature?

Helps users understand flags needed to install code-server properly.

Are there any workarounds to get this functionality today?

N/A

Are you interested in submitting a PR for this?

Maybe but anyone else can do it too.