feat: --packageManager=XYZ

[AmirSa12]

closes #268

[continuous-releases-staging]

Open in Stackblitz • example-1 • example-2

npm i https://a04db65f.stackblitz-cr.pages.dev/stackblitz-labs/pkg.pr.new/pkg-pr-new@286

npm i https://a04db65f.stackblitz-cr.pages.dev/stackblitz-labs/pkg.pr.new/playground-a@286

npm i https://a04db65f.stackblitz-cr.pages.dev/stackblitz-labs/pkg.pr.new/playground-b@286

commit: f3a6197

[Aslemammad]

amazing, i think at this point we have to remove the detect package manager stuff!

[Aslemammad]

Oh i see it's already done! thank you so much.

ok, let's add a slight documentation and ship this thing.

[Aslemammad]

why there are changes related to the previous pr? maybe you should rebase first!

[Aslemammad]

still, i think there should be a rebase. there are unrelated changes here.

[Aslemammad]

LGTM!