Compatibility with npm (aka without yarn)

[irisjae]

As of now, using the prime cli to init a project breaks if only npm is installed. Checking the source, it comes from the line where spawn () is used to call yarn. More generally, throughout the project, it assumes that yarn is already installed globally. Perhaps this can be partially mitigated by installing yarn as a devDependency? Not everybody has yarn installed globally (unlike npm).

[DblK]

I just tried to install it with npx @primecms/cli init and because I do not have yarn installed, it failed. I had to install it just for the use of cli.
Please update it to work with npm instead or add it to the documentation as prerequisite.