feat: add comprehensive documentation including user guide, API reference, and deployment instructions

docs/README.md

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+# DocuNova Documentation
+
+Welcome to the DocuNova documentation. This directory contains comprehensive guides to help you install, configure, and use DocuNova effectively.
+
+## Available Documentation
+
+- [User Guide](UserGuide.md) - How to use DocuNova's features and interface
+- [API Documentation](API.md) - Complete API reference for developers
+- [Deployment Guide](DeploymentGuide.md) - How to deploy DocuNova in various environments
+- [Configuration Guide](ConfigurationGuide.md) - All available configuration options
+- [Troubleshooting](Troubleshooting.md) - Solutions to common issues
+
+## Additional Resources
+
+- [Contributing Guide](../CONTRIBUTING.md) - How to contribute to DocuNova development
+- [License Information](../LICENSE) - Apache License 2.0 details
+
+## Support
+
+If you need additional assistance beyond what's covered in these guides:
+
+1. Check the [GitHub repository](https://github.com/christianlouis/document-processor) for updates and issues
+2. Contact the developer through the information provided on the About page
+
+## Screenshots
+
+![Upload Interface](upload-view.png)
+*DocuNova's upload interface*
+
+![Files View](files-view.png)
+*Document management interface*
+
+![Workflow Diagram](workflow-diagram.png)
+*DocuNova processing workflow*