added all controllers and cleaned middleware codes

[SID20046]

Overview

This PR implements all remaining controller functionalities, improves middleware structure, and enhances file upload handling with proper naming conventions. All routes have been thoroughly tested using HTTP methods in Postman.

Key Updates

1. Completed logic for:

• • Video Controllers – CRUD operations, publish status toggle, sorting, pagination.
• • Comment Controllers – Add, retrieve, update, and delete comments.
• • Like Controllers – Toggle likes on videos, comments, and tweets.
• • Playlist Controllers – Playlist creation, update, delete, and video management.
• • Tweet Controllers – Create, fetch, update, and delete tweets.
• • Subscription Controllers – Toggle subscription and retrieve subscriber/channel lists.
• • Channel Stats Controller – Fetch total views, subscribers, likes, and videos.

2. Middleware Improvements:

• Configured Multer to store files with:
  -- Original filename.
  -- Current date prefix for uniqueness.
  --Integrated with Cloudinary for cloud-based storage.

3. Route Testing

• Verified all routes using Postman:
• GET, POST, PUT, DELETE methods tested.
• Validated response formats, status codes, and error handling.

Testing and Verification

• All endpoints tested with valid and invalid inputs.
• Verified database updates (MongoDB) for CRUD operations.
• Confirmed secure handling of file uploads.