Automatic handling of PR reviews

[tomzx]

Background

As part of the agentic workflow for software development, the system should be able to automatically handle pull request reviews. This involves AI agents reviewing code changes, providing feedback, and potentially requesting changes or approving PRs based on predefined criteria and best practices.

Acceptance Criteria

• The agent creates a worktree with the PR's branch checked out and compares the provided description with the implementation, and ideally, if a reference issue is provided by the PR author, that issue is also verified against
• Implement an agent that can review pull requests for code quality, style, and correctness
• The agent should be able to comment on PRs with specific feedback and suggestions
• The agent should follow project conventions and coding standards defined in .sdlc/context/conventions.md
• The agent should be able to request changes or approve PRs based on review findings
• Integrate the PR review agent into the workflow so it can be triggered automatically or manually
• Ensure the agent respects review permissions and only acts as intended
• Update documentation to explain how the automatic PR review feature works