docs: create contribution guidelines

[codevalve]

Create Contribution Guidelines

Description

Develop clear guidelines for project contributors:

Guidelines Content

• Getting Started Guide
  • Development setup
  • Required tools
  • Local testing
• Contribution Process
  • Fork and PR workflow
  • Branch naming
  • Commit message format
• Code Standards
  • Shell script style
  • YAML formatting
  • Documentation requirements
• Testing Requirements
  • What to test
  • How to test
  • Test documentation
• PR Template
  • Checklist
  • Required information
  • Testing verification

Benefits

• Consistent contributions
• Easier review process
• Maintained code quality
• Better community engagement

Location

• CONTRIBUTING.md in root directory
• Referenced from README.md