chore: create auto-comment bot

[bradleycamacho]

This PR implements an action that comments on each PR and Issue opened. I was hoping I could find a way to exclude Docs team/DevEn PRs, but I couldn't figure it out 😓

I would need some assistance from DevEn to set up the GH token.

When a PR is opened:

Hi @{{ author }} 👋
Thanks for your pull request! Your PR is in a queue, and a writer will take a look soon. We generally publish small edits within one business day, and larger edits within three days.

When an issue is opened:

Hi @{{ author }} 👋
Thank you for filing an issue! We will triage this issue within one business day, and then route it to the appropriate team so we can get it solved. 

[github-actions]

Hi @bradleycamacho 👋
Thanks for your pull request! Your PR is in a queue, and a writer will take a look soon. We generally publish small edits within one business day, and larger edits within three days.

[gatsby-cloud]

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