Docs: Contributing — write CONTRIBUTING.md

[Hexstar-labs]

Description:
There are no contribution guidelines.

Tasks:

• Write CONTRIBUTING.md covering: code of conduct, branch naming conventions, commit message format (conventional commits), PR process, review checklist
• Add CODE_OF_CONDUCT.md (Contributor Covenant)
• Add issue templates for bug reports and feature requests in .github/ISSUE_TEMPLATE/
• Add SECURITY.md with responsible disclosure policy

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[techisigu]

@techisigu has applied to work on this issue as part of the Stellar Wave Program's 3rd wave.

I’m a smart contract developer who turns complex ideas into secure, production-ready blockchain code.
With strong skills in Rust and Solidity, I build systems that are fast, safe, and built to last.
My experience with the Stellar SDK lets me ship real-world Web3 solutions that actually move value

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

[drips-wave]

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

🧑‍💻 @techisigu: 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 🌊

[drips-wave]

This issue has been completed by @techisigu as part of the Stellar Wave Program's 3rd Wave 🥳

😎 @techisigu: You earned 200 Points for completing this issue! After the current Wave ends, you'll be eligible for a percentage of the Wave's reward pool based on the percentage of total points you've earned. Learn more here. You can also Leave a review to share your experience working on this issue.

🧑‍💻 Repo maintainers: How'd the contributor do? Leave a review to share your experience working with them.