see

• The mv command performs a copy even if the source and destination are on the same device. nushell/nushell#12015
• https://github.com/nushell/nushell/pull/12019/files

reproduce:

• clone a large front-end project, on Windows
• npm install
• cd node_modules to simulate a file being locked by a process
• Open a new shell.
• Run mv node_modules \.nd This command will take a long time and then fail.

is possible to change the fallback to copy only when the std::fs::rename report an ERROR_NOT_SAME_DEVICE/EXDEV error? this will failed immediately rather than takes a long time and then failed.

now it always trying to copy, even if it just an permission error, this takes a long time, and then failed again.