v0.6.0-rc8: Add WithStandardInput() to Shell.Run()

What's New in v0.6.0-rc8

✨ New Features

• WithStandardInput() - Added the ability to provide standard input to commands using the fluent builder API

📝 Usage Example

// Provide standard input to commands
var grepResult = await Shell.Run("grep")
    .WithArguments("pattern")
    .WithStandardInput("line1\nline2 with pattern\nline3")
    .GetStringAsync();

// Combine with pipelines
var sorted = await Shell.Run("sort")
    .WithStandardInput("banana\napple\ncherry")
    .Pipe("head", "-2")
    .GetLinesAsync();

🔧 Technical Details

• Added WithStandardInput(string input) method to RunBuilder
• Updated CommandExtensions.Run() to accept optional standardInput parameter
• Uses CliWrap's WithStandardInputPipe() under the hood
• Full test coverage for various stdin scenarios

Full Changelog: v0.6.0-rc7...v0.6.0-rc8