Implement a Github triage bot with the ability to comment based on label triggers

[aubrey-oneal]

In issue #3622, we created designs for a simple Github Triage that relies on labels to trigger commenting. This issue to build the first version of this bot.

Box note with labels and triggers

Resources:

• https://docs.github.com/en/actions/using-workflows/about-workflows
• https://github.com/marketplace/actions/respond-to-issue-based-on-label#create-workflow
• https://github.com/marketplace/actions/label-actions
• https://github.com/dessant/label-actions