feat: set pkgJson.packageManager on init?

[juliusmarminge]

Is your feature request related to a problem? Please describe.

the packageManager field in package.json is used by things like corepack and github actions. it's very annoying when that field isn't set

Describe the solution you'd like to see

automatically add the field on project init. probably use the current version of the package manager that the user is using (simple parse on npm -v, pnpm -v or yarn -v depending on the user agent)

Describe alternate solutions

not doing it, shifting the responsibility to the user

Additional information

No response

[c-ehrlich]

sounds good, open to PRs on this

[xonx4l]

Waiting for your thoughts on this @juliusmarminge .

[juliusmarminge]

Submit a PR!