Enrich features of comments' discussion

[mabdh]

Is your feature request related to a problem? Please describe.
Comments feature in discussions is currently just a simple list of text related with the respected discussion. We can add more features to the comments to give better user interaction and experience.

Describe the solution you'd like
Add more features to the comments

• Comment Replies: it is possible for each comment in the discussion to have child comments as replies.
• Comment Reaction (only parent comment that could have this feature)
  • Upvote
  • Emoji
• Filter comments by Top (based on vote), Since (yesterday, last week, last month
• If it is a q&a type,
  • users are able to suggest a comment as an answer
  • columbus could mark the comment as an answer