Implement CodeRabbit CLI provider for code review

[biwakonbu]

Overview

Implement ReviewProvider support for CodeRabbit CLI as the fourth AI agent tool integration.

Prerequisites

• ReviewProvider interface design completed
• Multiple providers already implemented for reference

Scope

• Implement CodeRabbitReviewProvider following established patterns
• Configure CodeRabbit CLI-specific invocation
• Set up prompt templates for CodeRabbit
• Add configuration options specific to CodeRabbit CLI
• Test integration with actual CodeRabbit CLI

Implementation Tasks

• Create CodeRabbitReviewProvider implementation
• Define CodeRabbit CLI-specific configuration schema
• Implement prompt template rendering for CodeRabbit
• Add CLI invocation and output parsing
• Handle authentication (if needed)
• Add integration tests
• Document configuration options

Success Criteria

• CodeRabbit CLI can be selected as review provider
• Configuration allows CodeRabbit-specific customization
• Code review workflow works end-to-end with CodeRabbit CLI
• Documentation includes CodeRabbit CLI setup instructions

Notes

CodeRabbit may have specific features or output formats that differ from other providers. Pay attention to its unique capabilities.

Labels

enhancement, code-review, ai-integration