Add comprehensive framework documentation and explanation

[Copilot]

Summary

This PR addresses the request to explain the Playwright C# UI Test Automation Framework by providing a comprehensive analysis and documentation of the framework's architecture, features, and capabilities.

What Was Added

Framework Analysis

• Architecture Overview: Detailed explanation of the modern .NET 8 + Playwright stack
• Component Breakdown: Analysis of each framework component and its purpose
• Design Patterns: Documentation of Page Object Model implementation and best practices

Key Features Documented

• Modern C# Implementation: Primary constructors, implicit usings, nullable reference types
• Test Lifecycle Management: Automatic browser setup/teardown with failure diagnostics
• Reporting Integration: Allure reports with screenshots and test categorization
• Configuration Management: Environment-specific JSON configuration
• CI/CD Integration: GitHub Actions workflows and Docker support

Technical Details

// Example of the clean Page Object Model pattern
public class TodosPage(IPage page)  // Modern C# primary constructor
{
    private readonly IPage _page = page;
    
    private ILocator NewTodoInput => _page.Locator(".new-todo");
    
    public async Task AddTodoAsync(string text)
    {
        await NewTodoInput.FillAsync(text);
        await NewTodoInput.PressAsync("Enter");
    }
}

Framework Strengths Highlighted

• Scalability: Modular architecture with clear separation of concerns
• Maintainability: Page Object Model for easy UI change management
• Production Ready: Docker containerization and CI/CD integration
• Developer Experience: Rich IDE support and comprehensive error handling

Framework Use Cases

This analysis demonstrates the framework is ideal for:

• Regression testing of web applications
• Cross-browser compatibility testing
• CI/CD pipeline integration
• Team collaboration with shared test infrastructure
• Portfolio demonstrations of testing skills
• Learning Playwright and modern C# testing practices

Value Added

This comprehensive explanation provides developers and stakeholders with a clear understanding of:

• How the framework is structured and why
• What modern practices it demonstrates
• How to get started with the framework
• What makes it production-ready and scalable

The documentation serves as both technical reference and educational material for understanding modern UI test automation practices.

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