feat: Implement Product Lifecycle Notification System

[niyibi250]

What does this PR do?

This PR enhances the application by implementing a notification system and setting up corresponding API routes to manage notifications effectively.

Description of Task to be completed?

**Notification System: **

• Implemented event-driven notifications for various scenarios such as product availability changes, order cancellations, and expired orders.

• Utilized nodemailer for sending email notifications to vendors.

• Integrated cron jobs for daily tasks like canceling expired orders and notifying vendors about unavailable products.

Notification API Routes:

**Created Express routes to handle notification operations: **

• GET /notifications: Retrieves all notifications.
• DELETE /notifications/vendor: Deletes all notifications.
• GET /notifications/vendor/:id: Retrieves notifications specific to a vendor.
• DELETE /notifications/vendor/:id: Deletes a specific notification.

How should this be manually tested?

**Notification System Testing: **

• Trigger various events (e.g., adding/removing products from cart, placing orders, updating products) to verify if notifications are generated correctly.

• Check the console logs for event triggers and email sending confirmation.

API Endpoint Testing:

• Use tools like Postman or curl to send requests to the notification endpoints (GET and DELETE).
• Validate responses to ensure correct handling of notification retrieval and deletion operations.
• Any background context you want to provide?
• The implementation includes error handling using middleware to manage potential issues

What is the relevant pivotal tracker/Trello stories?

Screenshots (if appropriate)

N/A

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 87.09677% with 8 lines in your changes missing coverage. Please review.

Project coverage is 90.46%. Comparing base (3f40153) to head (3966b3b).

Files	Patch %	Lines
src/controller/notificationController.ts	71.42%	8 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop      #92      +/-   ##
===========================================
- Coverage    90.67%   90.46%   -0.22%     
===========================================
  Files           58       61       +3     
  Lines         1501     1562      +61     
  Branches       163      167       +4     
===========================================
+ Hits          1361     1413      +52     
- Misses         118      126       +8     
- Partials        22       23       +1     

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[ambroisegithub]

I looks good for merge!!!