👋 suggestions to maintainers to encourage first-time users? #1419

For repository maintainers seeing issues and pull requests sent from first-time users, sending some happy "thank you!"s and emojis to the users can be a very encouraging, inclusive behavior. For example: https://github.com/DefinitelyTyped/DefinitelyTyped/pull/25007#issuecomment-381767908

Here is what GitHub shows for first-time users on their first pull requests:

...which is easy to miss and doesn't give much indication that this is a good time to encourage the user.

We already have 👋 suggestions from GitHub on the user's side:

How about adding versions of this for the maintainers' side?

• "👋 / It looks like this is <user-name>'s first issue on refined-github! How about sending some 🙌 emojis 🎈 and thanking them for their contribution?"

• "👋 / It looks like this is <user-name>'s first pull request! How about sending them some 🙌 emojis 🎈 and thanking them for their contribution?"

  • Alternate form: their first pull request ever
  • Alternate form: on completion of the pull request

Mockup:

(instigating Twitter thread: https://twitter.com/JoshuaKGoldberg/status/1019260761569280000)