The yarn create keystone-app does not work with username which have spaces in windows environment.

1. Just have username which have spaces in windows platform
2. Install yarn using node for that user
3. Then run `yarn create keystone-app` and it will fail

I expected to get a keystone app built using yarn cli


node version 16.13.1
yarn version 1.22.17
create keystone app 6.0.1

Start by reproducing `yarn create keystone-app` on Windows with a username containing spaces, using the reported Node, Yarn, and create-keystone-app versions. Trace the `keystone-app` entry point and how the user path is passed to the CLI. Done means the command completes and builds a Keystone app for such usernames.

Written by the indexing model from the issue text.