made the required changes for implementing like system for comment and going to implement the same for tutorial

[Huzaif-Ahmed]

made the required changes
i added the comment_likes collection and also implemented upvote downvote handling for the comment

Related Issue

#887

How Has This Been Tested?

checked manually

Types of changes

• [ x] New feature (non-breaking change which adds functionality)
• [ x] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• [ x] My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.