Autonomous test-driven fix loop

[hellodk]

Description

Add capability for autonomous test-driven fix loop - automated testing and fixing workflow integrated into the development process.

Acceptance Criteria

• Define the autonomous fix loop workflow
• Implement automated test discovery
• Implement automated test execution and result parsing
• Implement fix suggestion and application
• Integrate with VS Code plugin UI
• Document the workflow

Tests Required

• Unit tests for test discovery logic
• Unit tests for result parsing
• Integration tests for full loop execution
• E2E test for UI integration