Add comprehensive documentation for Home Assistant MCP project

- Created detailed getting started guide with installation and configuration instructions
- Added main documentation README with structured table of contents
- Developed troubleshooting guide with common issues, debugging tips, and FAQ
- Included development guide with project structure, setup, and contribution guidelines
- Added tools documentation with overview of available management tools

docs/README.md

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+# Home Assistant MCP Documentation
+
+Welcome to the Home Assistant MCP (Master Control Program) documentation. This documentation provides comprehensive information about setting up, configuring, and using the Home Assistant MCP.
+
+## Table of Contents
+
+1. [Getting Started](./getting-started.md)
+   - Installation
+   - Configuration
+   - First Steps
+
+2. [API Reference](./API.md)
+   - REST API Endpoints
+   - Authentication
+   - Error Handling
+
+3. [SSE (Server-Sent Events)](./SSE_API.md)
+   - Event Subscriptions
+   - Real-time Updates
+   - Connection Management
+
+4. [Tools](./tools/README.md)
+   - Device Control
+   - Automation Management
+   - Add-on Management
+   - Package Management
+
+5. [Configuration](./configuration/README.md)
+   - Environment Variables
+   - Security Settings
+   - Performance Tuning
+
+6. [Development](./development/README.md)
+   - Project Structure
+   - Contributing Guidelines
+   - Testing
+
+7. [Troubleshooting](./troubleshooting.md)
+   - Common Issues
+   - Debugging
+   - FAQ
+
+## Quick Links
+
+- [GitHub Repository](https://github.com/yourusername/homeassistant-mcp)
+- [Issue Tracker](https://github.com/yourusername/homeassistant-mcp/issues)
+- [Change Log](./CHANGELOG.md)
+- [Security Policy](./SECURITY.md)
+
+## Support
+
+If you need help or have questions:
+
+1. Check the [Troubleshooting Guide](./troubleshooting.md)
+2. Search existing [Issues](https://github.com/yourusername/homeassistant-mcp/issues)
+3. Create a new issue if your problem isn't already reported
+
+## License
+
+This project is licensed under the MIT License - see the [LICENSE](../LICENSE) file for details.