Enhance README with comprehensive project description

Author: openhands-agent

README.md

@@ -1,6 +1,28 @@
 # PR Viewer
 
-This React application allows you to view open pull requests from GitHub repositories in a GitHub organization. By default, it uses the All-Hands-AI organization.
+A modern, responsive React application that provides a streamlined interface for viewing and managing pull requests across multiple repositories in a GitHub organization. By default, it uses the All-Hands-AI organization, but it can be configured to work with any GitHub organization.
+
+## Features
+
+- **Organization-wide PR Overview**: View all open pull requests across multiple repositories in a single dashboard
+- **Real-time Updates**: Automatically refreshes pull request data to show the latest status
+- **Filtering and Sorting**: 
+  - Filter PRs by repository, author, or review status
+  - Sort PRs by creation date, update date, or number of comments
+- **Quick Access**:
+  - Direct links to PR discussions and diffs
+  - One-click access to repository details
+- **Responsive Design**: Works seamlessly on desktop and mobile devices
+- **Customizable**: Easy configuration for different GitHub organizations
+
+## Architecture
+
+The application is built using:
+- **React** with TypeScript for type safety and better developer experience
+- **Vite** as the build tool for fast development and optimized production builds
+- **React Query** for efficient data fetching and caching
+- **GitHub REST API** for retrieving repository and pull request data
+- **Tailwind CSS** for responsive and maintainable styling
 
 ## Setup
 
@@ -29,6 +51,32 @@ To build the app for production, use: `npm run build`
 
 Make sure to replace `your_github_token_here` with an actual GitHub personal access token that has the necessary permissions to read repository and pull request information from the target organization.
 
+## Contributing
+
+We welcome contributions to PR Viewer! Here's how you can help:
+
+1. **Report Issues**: Open an issue for any bugs or feature requests
+2. **Submit Pull Requests**: 
+   - Fork the repository
+   - Create a feature branch (`git checkout -b feature/amazing-feature`)
+   - Commit your changes (`git commit -m 'Add amazing feature'`)
+   - Push to your branch (`git push origin feature/amazing-feature`)
+   - Open a Pull Request
+
+### Development Guidelines
+
+- Follow the existing code style and TypeScript conventions
+- Write tests for new features using Vitest
+- Update documentation as needed
+- Keep commits focused and write clear commit messages
+- Run tests locally before submitting PRs
+
+### Code Quality
+
+- Run linting: `npm run lint`
+- Run type checking: `npm run typecheck`
+- Format code: `npm run format`
+
 ## License
 
 This project is licensed under the MIT License. See the [LICENSE](LICENSE) file for details.