fix: use node cp function for more robust copying in packito

[KW-M]

Fix issues

Currently copying folders on macs when the destination folder doesn't exist yet results in the error "Error: ENOTSUP: operation not supported on socket, copyfile" The folder is definitely a folder, not a socket. This node bug pops up random places when anything with the filesystem is weird like symlinks, network shares, and in this case macos being weird.

Description

• Now uses fs.cp to copy files and folders which is much more robust to weird files, folders and will properly follow symlinks. - Will fallback to fs.copyFile when fs.cp is unsupported (node < 16.7).
• Added log message when a copy error occurs

Check List

• [ x ] respect code conventions and usages
• [ x ] tests and 100% coverage
• [ x ] well documented
• [ x ] self review

Review targets:

• nodejs / npm / yarn

Thanks for making this handy tool!