How patch files can transform how you review code

What this post added

This post introduces and details the use of patch files in code reviews as a method for reviewers to provide actionable, testable code suggestions. It explains how patch files contain commit metadata, how to create them using `git format-patch` and apply them using `git am`, and contrasts this with GitLab's suggestion feature and raw Markdown comments. The post also mentions GitLab's evaluation of integrating patch files into the code review and merge request workflow.