Render CSV diffs in table view

Release Notes

It can be challenging to view a CSV to understand the data and how it is related in columns and rows, especially with large files. Previously, this information was presented as raw text in GitLab repositories. We've improved the rendering of this type of data and now when diffed in GitLab, CSVs are represented as a table with the actual comma separated values.

Summary

Follow up to #14174 (closed)

We have delivered a CSV blob viewer- now we need to tackle diffs...

Problem to Solve

It is challenging to view a CSV an understand the data and how it's related in to column and rows. This is especially challenging with large files that are contained in the repository and need to be viewed.

https://docs.gitlab.com/ee/development/diffs.html

Additional Details

CSV's can be diffed inside of GitLab, but they're presented as raw text:

Proposal

CSVs should be represented as a table with the RAW view representing the actual comma separated values.

/cc @oregand