Write the two sec-ai Welcome Guides (for users and contributors)

[alphanome]

We need to create two one-pager documentation that provides a comprehensive introduction to sec-parser for newcomers. This document should serve as a quick guide to understanding the project, its structure, algorithm design, domain context, and contribution guidelines.

[Elijas]

Hello,

This issue is being closed as it's not something we plan to work on in the immediate future. We've consolidated our roadmap and future plans in a centralized location to provide a clear and structured overview of our project's direction.

For anyone visiting this issue in the future, please refer to our roadmap and future plans discussion at this link for more information.

Thank you for your understanding.

Best,
Elijas