[FEATURE] email unsubscribe

[bibicadotnet]

I checked and there is no feature to turn off notifications for users when there are new comment replies (https://artalk.js.org/guide/backend/email.html)

By default, I see that when a user replies, an email will be sent to them The problem is that after a while, they may not need to receive notifications anymore, but there is no place to turn them off