Add Contributor Onboarding Guide

[Abd-Standard]

Description
Create a contributor guide explaining how to set up the project, follow coding standards, and submit pull requests. This improves the onboarding experience.

Acceptance Criteria
Setup instructions are included.
Contribution workflow is documented.
Pull request guidelines are provided.

[Marvelg256]

Hi! I'd like to work on this issue. I have a strong problem-solving background and have reviewed the issue. I'm confident I can implement a clean solution and submit a PR within 48 hours. Looking forward to contributing!

[Keengfk]

@Keengfk has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

I will love to work on this issue,pls 🙏 give me

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Keengfk to this issue.

[Kingsuite]

@Kingsuite has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

I would love to add the Contributor Onboarding Guide

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Kingsuite to this issue.

[drips-wave]

Congratulations, @Kingsuite! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

🧑‍💻 @Kingsuite: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

Warning

When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.

🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

🌊 Happy Wave 🌊