Discussion: Use Issues for Discussions for now

[hacker-DOM]

Github's Slack integration does not currently support receiving notifications for comments in Discussions[1] (Also, comments cannot be separated into Issues and PRs[2]). The team indicates that they plan to add this in the future.

Since it is easy to convert an Issue into a Discussion, and I'm pretty sure all comments are retained, I suggest we just use Issues for now. We can mark them with labels discussion:nontechnical and discussion:technical and promote them to Discussions of these categories later on

[1] https://github.com/integrations/slack/issues/1026#issuecomment-995435679 [2] https://github.com/integrations/slack/issues/591