v0.6.0-rc7: Shell.Run() Fluent Builder API

What's New

✨ Shell.Run() Fluent Builder API

• Added Shell.Run() for fluent command configuration
• Provides consistent API pattern matching DotNet.Run(), Fzf.Run(), etc.
• Enables elegant command building with method chaining

📋 Example Usage

// Simple command with arguments
var result = await Shell.Run("git")
    .WithArguments("log", "--oneline", "-n", "10")
    .GetStringAsync();

// Complex command with environment and validation
var output = await Shell.Run("docker")
    .WithArguments("run", "--rm", "-v", "/host:/container")
    .WithEnvironmentVariable("NODE_ENV", "production")
    .WithWorkingDirectory("/workspace")
    .WithNoValidation()
    .ExecuteAsync();

🔧 Test Infrastructure Improvements

• Tests now use ProjectReference instead of PackageReference
• Improved development workflow with direct source references
• Added comprehensive RunBuilder integration tests

🤖 Generated with Claude Code

Co-Authored-By: Claude noreply@anthropic.com