As we know, in NodeBB there is concept like "One Topic" has multiple "Reply" (Posts).
I wanted to implement functionality which provides facility for the user to make
"Comments" on each reply. So the hierarchy will be :
--> Comment 1
--> Comment 2
Most important is I wanted to do this using PLUGIN approach.
So Is there any similar plug-in available which can help me?
If I want to implement this then how should I start this? Any guidelines.
Off the top of my head, I think it's doable with the current hooks available. That said, it would be quite a big plugin. If you want to attempt building it I'll be happy to point you in the right direction if you get stuck.
Alternatively contact us at firstname.lastname@example.org and maybe we can build that for you