feat: add stealth address module

[jstinhw]

Summary

Add stealth address module

Change Type

• [ ] Bug Fix
• [ ] Refactor
• [x] New Feature
• [ ] Breaking Change
• [ ] Documentation Update
• [ ] Performance Improvement
• [ ] Other

Checklist

• [ ] My code follows this project's style guidelines
• [ ] I've reviewed my own code
• [ ] I've added comments for any hard-to-understand areas
• [ ] I've updated the documentation if necessary
• [ ] My changes generate no new warnings
• [ ] I've added tests that prove my fix is effective or my feature works
• [ ] All unit tests pass locally with my changes
• [ ] Any dependent changes have been merged and published

Additional Information

Reference of stealth address module: https://hackmd.io/xgpI7DB_SPSyDOLsYGI1tA

Branch Naming

[Aboudjem]

Thanks for the contribution @jstinhw ! We will review it shortly! 🚀🚀🚀

[github-actions[bot]]

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