fix: use correct PowerShell casing in enum variant

[jdx]

Summary

• Use proper CamelCase PowerShell for the Rust enum variant (matching Microsoft's official branding)
• Add #[clap(name = "powershell")] to preserve the lowercase command name for CLI usage

Test plan

• Tests pass
• Generated docs correctly use powershell.md (not power-shell.md)

🤖 Generated with Claude Code

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Note

Ensures correct PowerShell branding in the CLI while keeping the user-facing subcommand stable.

• Rename enum variant from Powershell to PowerShell in cli/src/cli/mod.rs
• Add #[clap(name = "powershell")] to preserve the lowercase CLI subcommand name
• Update the match arm to use Command::PowerShell when executing pwsh

^{Written by Cursor Bugbot for commit cef822e. This will update automatically on new commits. Configure here.}

[Copilot]

Pull request overview

This PR corrects the casing of the PowerShell enum variant to match Microsoft's official branding (PowerShell rather than Powershell), while preserving the lowercase CLI command name for backward compatibility.

Changes:

• Updated enum variant from Powershell to PowerShell with proper CamelCase
• Added #[clap(name = "powershell")] attribute to maintain lowercase command-line interface
• Updated match arm to use the corrected PowerShell variant name

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[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 47.36%. Comparing base (a557358) to head (cef822e).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
cli/src/cli/mod.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #438   +/-   ##
=======================================
  Coverage   47.36%   47.36%           
=======================================
  Files          47       47           
  Lines        6653     6653           
  Branches     6653     6653           
=======================================
  Hits         3151     3151           
  Misses       1739     1739           
  Partials     1763     1763           

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