Add WFGY to GitHub Repositories list (LLM/RAG debugging)

[onestardao]

Description

This PR adds WFGY to the “GitHub Repositories” section of the main README.
WFGY is an open source, framework-agnostic debugging layer for LLM agents and RAG pipelines, with a 16-mode ProblemMap and practical triage checklists.
This entry helps users discover a dedicated tool for diagnosing and fixing common LLM/RAG failure modes, alongside the existing learning resources in this repo.

Fixes #1704

Type of change

• Added a new machine learning frameworks, libraries or software.
• Documentation update

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings

[github-actions]

Thank you for submitting your pull request! 🙌 We'll review it as soon as possible. In the meantime, please ensure that your changes align with our CONTRIBUTING.md. If there are any specific instructions or feedback regarding your PR, we'll provide them here. Thanks again for your contribution! 😊

[onestardao]

Hi, just a gentle follow-up on this PR.

I opened it after your suggestion in issue #1704, and I’m happy to adjust anything if the entry needs to match a preferred format or section style.

Thanks for reviewing when you have a moment!