fix(scripts): fix create-package path check

[ccharly]

Explanation

It was not possible to use yarn create-package to create new package with the current implementation since fs.stat throws an error if the path does not exists.

Also, I replaced stat by access, cause if the path already exists (no matter if it's a dir or file), the script will fail since the path is not "available".

References

N/A

Changelog

N/A

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've highlighted breaking changes using the "BREAKING" category above as appropriate
• I've prepared draft pull requests for clients and consumer packages to resolve any breaking changes

[mcmire]

This was fixed by #5123. I think your way might be a bit better, but the core bug should already be fixed. So up to you on whether you still want to merge this.