feat: implement email notification system for comments

- Added MailModule to handle email notifications for comment events.
- Introduced CommentCreatedEvent to encapsulate comment creation details.
- Implemented CommentNotificationListener to send notifications to relevant users when a comment is created.
- Integrated Resend service for sending emails, with templates for comment notifications.
- Updated various modules to support the new email notification feature.

Signed-off-by: Innei <tukon479@gmail.com>

apps/web/package.json

@@ -114,4 +114,4 @@
     "vite-plugin-html": "3.2.2",
     "vite-plugin-pwa": "1.1.0"
   }
-}
+}