Enhance Documentation for Catalogue Server: Expanded Setup and Usage Guide

[Kranthi-Guribilli]

This PR introduces several important documentation updates and additions to ensure clarity, collaboration, and security in the server:

• Code of Conduct: Establishes guidelines for respectful and inclusive interactions within the community.
• Contribution Guidelines: Provides a clear structure for contributing, including setup instructions, coding standards, and pull request expectations.
• Security Documentation: Outlines the process for reporting vulnerabilities and security best practices.
• Documentation Updates: Enhances Readme.md, explanation.md, solution_architecture.md, FAQ.md, and configuration.md for improved setup guidance, architecture insights, and common troubleshooting tips.
• These updates are intended to support a better contributor experience and improve the overall maintainability of the server.

[jenkins-datakaveri]

Can one of the admins verify this patch?