Quickly resolve broken CI/CD pipelines with AI

What this post added

This post introduces and details GitLab Duo's Root Cause Analysis (RCA) feature for CI/CD pipeline failures. It explains the common causes of pipeline failures, the challenges of manual troubleshooting, and how RCA leverages generative AI to analyze logs and stack traces, identify the root cause, suggest fixes, and provide code suggestions. It also highlights the privacy-first approach and the ability to ask follow-up questions within the IDE.