message: add issue/pr templates
diff: @@ -56,6 +56,7 @@ Stale issues get the `stale` label.
  # Anti-contribution
  +- Obtuse commit messages, issues/PRs without any details.
  - Obviously, anything that violates our [Code of Conduct](CODE_OF_CONDUCT.md)
  - Noisy comments: "me too!", or "here's my setup" when the bug's already been located. Use a :thumbsup: emoji on the issue/PR instead, since we can count these.
  - Non-constructive complaining.
  