Added tools system documentation and flow diagram

[yunusj]

Description

This PR adds comprehensive documentation for the Marvel AI Tools System, including a detailed README and technical diagram that illustrates the system's architecture and flow. This documentation aims to improve developer onboarding and system understanding.

Related Issue

N/A - Documentation improvement initiative

Type of Change

• Documentation update: Changes or updates to documentation.

Proposed Solution

Added two key documentation components:

1. tools-readme.md: A comprehensive documentation file that covers:

   • Feature overview of the Tools System
   • High-level architecture description
   • Detailed explanation of how tools work
   • Testing procedures and best practices
   • Troubleshooting guide
   • Contributing guidelines

2. tools-technical-diagram.png: A sequence diagram that visualizes:

   • Component interactions in the Tools System
   • Data flow from user input to response
   • Integration points between frontend and backend
   • System's interaction with external services (Gemini AI, Firestore)

How to Test

1. View the tools-readme.md in the root directory:

   • Verify all sections are properly formatted
   • Check that all links work correctly
   • Ensure the technical diagram is properly displayed

2. Review the technical diagram:

   • Verify accuracy of component names
   • Confirm the sequence flow matches actual implementation
   • Check that all major system components are represented

Unit Tests

No unit tests required as this is a documentation-only change.

Documentation Updates

• Yes

Updates include:

• New tools-readme.md file in the root directory
• New tools-technical-diagram.png technical diagram
• Both files provide comprehensive documentation of the Tools System

Checklist

• I have performed a self-review of my code.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.
• Any dependent changes have been merged and published in downstream modules.

Additional Information

This documentation was created based on analysis of the current codebase and system architecture. It serves as a single source of truth for understanding the Tools System implementation and will be particularly valuable for:

• New developers joining the project
• Teams implementing new tools
• Understanding the system's architecture and flow
• Troubleshooting issues