Update Code Quality docs use cases

Problem to solve

There are some gaps on the documentation in spelling out the use cases for Code Quality and what kind of data a user will get from the feature in varying places like when the Merge Request widget will show up and when it will stop working and where the data for the full report comes from.

Further details

Code Quality Docs

Some examples of comments in issues and the forum that have attempted to clarify that should be consolidated to docs.

Proposal

  • Update the format of the Code Quality docs page to call out each feature, the problems it solves and steps/expectations for how to make that work.

Who can address the issue

Other links/references