Try support PowerShell

[swissspidy]

No description provided.

[github-actions]

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[gemini-code-assist]

Code Review

This pull request introduces Windows support for the WP-CLI shell by utilizing powershell.exe and Read-Host. Feedback highlights a lack of command history support in the new PowerShell implementation, which is a regression compared to other shells. Additionally, the removal of the shell binary validation check for non-PowerShell environments should be restored to ensure proper error handling for custom shell configurations.

[gemini-code-assist]

The new PowerShell implementation provides basic REPL functionality, but it's missing command history support, which is a crucial feature for an interactive shell. The use of Read-Host with the -NoProfile switch on powershell.exe prevents the use of PSReadLine for history. This is a significant usability regression compared to the bash/ksh implementation which explicitly handles a history file.

Please consider implementing history support for PowerShell. This could involve:

• Manually managing a history file with PowerShell commands (e.g., Get-Content/Add-Content).
• Interacting with the PSReadLine module's history functions if it's available.

Without history, the shell is much less productive.

[codecov]

Codecov Report

❌ Patch coverage is 54.54545% with 5 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/WP_CLI/Shell/REPL.php	54.54%	5 Missing ⚠️

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