v0.6.0-rc4: Command Mocking Support

What's New

🎭 Command Mocking Support

• Added class for mocking external commands during testing
• Override command paths with
• Thread-safe implementation with full test coverage
• Perfect for testing code that uses interactive tools like fzf, git, etc.

📚 Documentation

• Added Testing and Mocking section to README.md
• Updated CLAUDE.md with mocking examples and API reference

🔧 Other Changes

• Added to test helpers
• Fixed nullable reference warnings in tests
• Renamed Configuration.cs to CliConfiguration.cs for consistency

Example Usage

// Set up mocks for testing
CliConfiguration.SetCommandPath("fzf", "/path/to/mock/fzf");

// Your code using fzf will now use the mock
var result = await Fzf.Run()
    .FromInput(choices)
    .GetStringAsync();

// Clean up
CliConfiguration.Reset();