Display diffstat for each file and for the whole changed files

### The feature request

It is unclear how many lines are affected in a changeset before making a commit.
Hence, I would like to see a similar look displaying diffstat (+1 -2) on github.com (for a commit)

### Proposed solution

This will help the users to assess the diffstat while making changes locally.

### Additional context

It will be helpful if we display like the above in Github desktop.
Optionally, we can also make it as a feature that can be disabled or enabled as per user wish.