[Documentation] Installation command not compatible with Windows PowerShell

[Cjantwhy]

Description

The installation command in the README fails when executed on Windows PowerShell:

mv CN/* CN/.* . 2>/dev/null ; rmdir CN

Error Message

out-file : 未能找到路径"C:\dev\null"的一部分。
所在位置 行:1 字符: 1
+ mv CN/* CN/.* . 2>/dev/null; rmdir CN
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : OpenError: (:) [Out-File], DirectoryNotFoundException
    + FullyQualifiedErrorId : FileOpenFailure,Microsoft.PowerShell.Commands.OutFileCommand

Environment

• OS: Windows 11
• Shell: PowerShell 5.1

Root Cause

The command uses Linux/Unix shell syntax which is not compatible with Windows PowerShell:

• 2>/dev/null is Linux-specific error redirection
• /dev/null doesn't exist on Windows

Suggested Solution

Add Windows-specific instructions to the README:

For Linux/macOS:

mv CN/* CN/.* . 2>/dev/null ; rmdir CN

For Windows PowerShell:

mv CN\* . 2>$null; mv CN\.* . 2>$null; rmdir CN

Or suggest using WSL/Git Bash for Windows users.

Additional Context

Windows users may encounter this issue during installation. Adding platform-specific commands would improve the installation experience for cross-platform users.

Would you like me to submit a PR to update the documentation?