[Feature request]: GitHub Action To Alert On Stale Branches

[TimothyWillard]

Label

meta/workflow

Priority Label

low priority

Is your feature request related to a problem? Please describe.

There's currently a large number of git branches several of which are outdated and cause bloat slowing down git clone/fetch times. It also makes it more difficult to discern what is and is not relevant development wise.

Is your feature request related to a new application, scenario round, pathogen? Please describe.

No response

Describe the solution you'd like

A GitHub action that runs say once a month that checks the timestamp of the last commit to each branch and if it's older than 2 months send an alert to slack (using https://github.com/slackapi/slack-github-action). Ideally want to find a sweet spot so they're not annoying or onerous, but also not subtle enough that they are not just ignored. Also would probably want a way to ignore some branches that we want to keep regardless of last commit.