Add Documentation for Contributors and Jira Task Creation

- Introduced a new CONTRIBUTORS.md file to outline the team structure and roles involved in the project, enhancing transparency and collaboration.
- Created a JIRA_TASK_RULES.md file detailing mandatory rules and standards for creating Jira tasks, ensuring consistency and clarity in task management.
- Included guidelines on task labels, sprint assignments, relationships, and structure to streamline the task creation process.
- Added critical reminders to emphasize the importance of proper task management practices within the team.

CONTRIBUTORS.md

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+# Contributors
+
+This project is developed and maintained by the following team members:
+
+## Team Structure
+
+### Tech Lead
+- **h.barzegar** - Technical leadership and architecture decisions
+
+### Team Lead
+- **n.nakhostin** - Project management and team coordination
+
+### Analytics
+- **n.sagharidooz** - Data analysis and business intelligence
+
+### Backend Developer
+- **n.nakhostin** - Server-side development and API implementation
+
+### Panel Developer
+- **a.jamali** - Web panel frontend development
+- **sina_nokhostin** - Web panel frontend development
+
+### Landing Developer
+- **sina_nokhostin** - Web landing frontend development
+
+### Application Developer
+- **a.ghabeli** - Mobile application development
+
+### QA
+- **a.sheikhmemari** - Quality assurance and testing
+
+### Designer
+- **s.fathali** - UI/UX design and user experience
+
+### DevOps
+- **n.nakhostin** - Infrastructure and deployment
+- **h.barzegar** - Infrastructure and deployment
+
+---
+
+## Project Information
+
+**Project Name:** Tender Management Backend  
+**Repository:** TM/tm_back  
+**Technology Stack:** Go, MongoDB, Echo v4, JWT Authentication
+
+## Contact
+
+For questions or contributions, please contact the Tech Lead or Team Lead.
+
+---
+
+*Last updated: 17 September 2025*