Speed up code reviews: Let AI handle the feedback implementation

Introduces the integration of GitLab Duo with Amazon Q, enabling an AI agent to automatically implement code review feedback. This is achieved by using the `/q dev` quick action in a comment, which prompts Amazon Q to analyze reviewer comments within a merge request and modify the code accordingly. The changes are then visible in the 'Changes' tab for verification. This feature aims to automate the implementation of feedback, reducing manual effort and speeding up code review cycles.