Skip package manager installation script

[theoparis]

I am using pnpm instead of yarn or npm, and keystone tries to install it with npm which is much slower. Can this get a feature to skip package manager installation commands and just write to the package.json file manually?

[bladey]

Thanks for the suggestion @creepinson! I'll check with the team on this.

[dcousens]

@theoparis we agree this is painful, we'll be removing that and changing this to a two step process instead. Stay tuned!