Create sample 'ideal' issue

As a new ateam member, I would like to have a checklist of the things I need to do when I create an issue (phrase it as a user story, which labels to assign, etc) and also see what an example issue might look like so that I can quickly get up to speed on how dwyl keeps projects organised.

**Time estimate:** 1hour

_Note: requested by @SimonLab originally during a sprint retrospective._
link to: https://github.com/dwyl/contributing/issues/8