Sort branches by commits ahead or behind

Description

Sort branches by commits ahead or behind

Proposal

Add new sort option to the branches index view to order branches according to how far ahead or behind of the default branch they are, by number of commits

Documentation blurb

Overview

What is it?

New sort options for the branches index view

Why should someone use this feature?

This feature would be used by users looking to find stale/old branches

How do you use this feature?

Select new options from the dropdown to order branches

Use cases

Who is this for? Provide one or more use cases.

This feature would be used by users looking to find stale/old branches

Feature checklist

Make sure these are completed before closing the issue, with a link to the relevant commit.

• Feature assurance
• Documentation
• Added to features.yml