Add attribution sufficient for CC BY-SA to the chat user when creating an MS comment from chat

[makyen]

Any comment which SD forwards to MS should include attribution, per the CC BY-SA license. We currently don't do that for comments which are forwarded by users who do not have an MS account. The attribution could be text and a links within the comment text. We should also have a link for any such forwarded comment back to the original comment in chat, as that's also required by the CC BY-SA license.

There was a discussion in chat about this. (The link is to what is the tail end of the conversation at the time this issue was created, as it's easier to follow a disjointed conversation backwards than it is to follow it forward.)

[stale]

This issue has been closed because it has had no recent activity. If this is still important, please add another comment and find someone with write permissions to reopen the issue. Thank you for your contributions.

[makyen]

While not fully resolved, this should be substantially addressed by #7232 and #7231.