Feature: Assign Back and Comment on PRs that do not Reference an Issue No.

[nelsonic]

Our Contributing Workflow starts with Opening an Issue:
https://github.com/dwyl/contributing/tree/cc3a47b5b4d1157e35f76c0fd5dcea6c0fad20f1#part-1-describe-your-question-the-idea-or-user-story-in-an-issue

Yet we are still getting people opening PRs ignoring the "contributing guide"... 😞
(note: I know that we need to "streamline" the contributing.md, but haven't had time recently ...)

I'm trying to be "nice" / "helpful" / "welcoming" to new contributors. e.g: dwyl/hapi-auth-jwt2#240
but the fact that the PR does not reference an issue where the feature was discussed
before the PR was opened should normally be an automatic "Close and Comment" (IMO).
If we open exceptions for "small features" we will get a torrent of them once our app(s) are "live"!

[iteles]

I would suggest we don't want to reject them, but certainly assign it back to the person who opened the PR and add a comment to explain. I think that would be 👌