Write comprehensive AI testing documentation

[devload]

Description

Create comprehensive documentation for AI-powered testing feature.

Requirements

• Explain workspace-based AI concept
• Document all CLI parameters
• Provide usage examples
• Include troubleshooting guide
• Document response.json format
• Show real-world scenarios

Files

• docs/AI_TESTING_GUIDE.md
• Update README.md with AI section

Content to include

• How AI testing works
• Quick start guide
• CLI parameters reference
• Action types documentation
• Scenario file examples
• Troubleshooting common issues
• Tips for effective goal setting

Acceptance Criteria

• AI_TESTING_GUIDE.md created
• README.md updated
• Examples tested and verified
• Screenshots added (optional)