Previously, on some machines this command:
`pnpx create-payload-app@beta app` created a project using `npm`,
instead of `pnpm`, the same with `yarn`.
Also, the way we detected the package manager was always prioritizing
`pnpm`, even if they executed the command with `yarn` / `npm`. Now we
are relying only on from which package manager user executed
`create-payload-app`.
The code for detection is grabbed from create-next-app
https://github.com/vercel/next.js/blob/canary/packages/create-next-app/helpers/get-pkg-manager.ts
c6246618ba