MAIN: Email Notifications (Aadi)

[hkkubais]

Description:
As a user, I want to receive email notifications when there are new replies or posts, so that I stay updated without constantly checking the platform

Justification for Priority:
It's important to know when someone has replied to a user's post to get an update on questions/inquiries.

Impact: This feature plays a critical role in enhancing user engagement by allowing users to stay updated on replies or new posts without manually checking the platform. By receiving timely email notifications, users will remain more active and responsive, improving overall platform interaction.

Effort: With a priority of P0, this task has been estimated at 10 hours, covering both backend work for sending notifications and frontend development for user control over notification settings.