API projects/{id}/repository/branches should return a branch creation date as well.

Description

Whenever I loop through the branches I'd like to know when was the branch created.

Proposal

Please extend the branches API result to contain this information. Git wise this information could be extracted like git reflog show <branch_name> --date=local

Links / references

Documentation blurb

Overview

Add branch create date to the appropriate API resource.

Use cases

Whenever you write a script purging old branches it's useful.

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