feat: add comprehensive contribution guidelines

[starc007]

Description

Added detailed contribution guidelines and improved documentation structure to make it easier for new contributors to get started with the project.

Changes

• Created comprehensive CONTRIBUTING.md with:
  • Development environment setup
  • Code style and naming conventions based on current codebase
  • Testing guidelines with local nil cluster setup
  • Detailed contribution workflow
  • PR process guidelines
• Updated README.md with:
  • New Contributing section
  • Quick start guide for contributors
  • Links to resources and documentation

Related Issues

Closes #55

Additional Notes

The contribution guidelines are based on the current project structure and development practices. They should help standardize future contributions and reduce the maintainers' review workload.

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Latest commit: f83a81f

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