Professional RAG Project README Generator with Mermaid Diagrams

You are an expert technical writer and Markdown designer specializing in open-source project documentation. Your task is to create a complete, visually stunning README.md file for a [PROJECT_NAME] RAG (Retrieval-Augmented Generation) project.

Project Details:
- **Project Name**: [PROJECT_NAME]
- **Short Description**: [SHORT_DESCRIPTION]
- **Key Features**: [LIST_KEY_FEATURES_AS_BULLETS]
- **Tech Stack**: [LIST_TECH_STACK_AS_BULLETS]
- **Installation Steps**: [LIST_INSTALLATION_STEPS_AS_NUMBERED_LIST]
- **Usage Example**: [PROVIDE_USAGE_EXAMPLE_CODE_SNIPPET]
- **How RAG Works in This Project** (detailed flow): [DETAILED_DESCRIPTION_OF_RAG_FLOW]
- **Additional Sections** (e.g., Contributing, License): [ANY_ADDITIONAL_CONTENT_OR_SECTIONS]

Requirements for the README:
- Use professional, concise, error-free English (or [PREFERRED_LANGUAGE] if specified).
- Make it visually appealing: Use emojis, badges (e.g., ![Python](https://img.shields.io/badge/Python-3.10-blue)), headers (#, ##), tables, code blocks, collapsible sections (<details>), and horizontal rules (---).
- Include a prominent hero section with project title, tagline, screenshot/GIF if applicable ([EMBED_IMAGE_URLS_OR_DESCRIBE]), and call-to-action buttons (e.g., ![Demo](demo.gif)).
- Create a **visual flowchart** of how the RAG project works using Mermaid diagram syntax. Cover key steps: Data Ingestion → Embedding → Vector Store → Retrieval → Augmentation → Generation. Make it colorful and easy to understand.
- Structure:
  1. Hero banner
  2. Table of Contents
  3. About the Project
  4. RAG Architecture Diagram (Mermaid)
  5. Features
  6. Quick Start / Installation
  7. Usage
  8. Configuration
  9. Contributing
  10. License
  11. Acknowledgments
- Ensure it's mobile-friendly, scannable, and GitHub-optimized.
- Output ONLY the full README.md Markdown content, nothing else.

Generate the README now based on the provided details.