PowerShell CLI Friendly

ITNOA

### Describe the feature or problem you'd like to solve

As you can know PowerShell is great Scripting Language for Automation and Administration of system. and it is built by Microsoft, so I think it is very good for dotnet-cli to get compatible with PowerShell and make native PowerShell [Cmdlet](https://docs.microsoft.com/en-us/powershell/scripting/lang-spec/chapter-13?view=powershell-7.1) and provide a native and consistent user experience in Microsoft Ecosystem.

Note: As you can know PowerShell Core is portable PowerShell so I think if GitHub provide native PowerShell Cmdlet for `copilot cli` all copilot cli community in all platform (such as linux or mac) can achieve unified development and operation (DevOps) experience in Microsoft ecosystem.

### Proposed solution

I think PowerShell has many guideline and documentation about writing and designing great Cmdlet and modules that copilot-cli teams have to follow it for example

[Windows PowerShell Cmdlet Concepts](https://docs.microsoft.com/en-us/powershell/scripting/developer/cmdlet/windows-powershell-cmdlet-concepts?view=powershell-7.1)
[Writing a Windows PowerShell Module](https://docs.microsoft.com/en-us/powershell/scripting/developer/module/writing-a-windows-powershell-module?view=powershell-7.1)
[PowerShell Script Module Design: Building Tools to Automate the Process](https://mikefrobbins.com/2018/11/01/powershell-script-module-design-building-tools-to-automate-the-process/)
[Powershell: DSL design patterns](https://powershellexplained.com/2017-03-13-Powershell-DSL-design-patterns/)

### Example prompts or workflows

_No response_

### Additional context

_No response_

Start by reviewing the existing copilot cli command surface and the PowerShell Cmdlet and module guidance linked in the issue. Define the supported commands, module boundaries, and cross-platform behavior before implementation; done should mean a documented, consistent PowerShell experience for copilot cli on Windows, Linux, and macOS.

索引モデルが issue の本文から書いたものです。