Does not work on Windows as there is a dependency on grp

[iron3oxide]

Describe the bug
Since 'helpers.py' imports the 'grp' module, which is UNIX-exclusive, the CLI can be installed on Windows, but not executed.

To Reproduce
Steps to reproduce the behavior:

1. Install fm via 'uv tool install'
2. execute any fm command

Expected behavior
The CLI to work

[meichthys]

I agree that it would be useful to run natively on Windows, but currently this is expected. The recommended way to run on Windows is via WSL.

[meichthys]

See: https://github.com/rtCamp/Frappe-Manager/wiki/wsl-support