Added confirmation modal window whenever user wants to follow and unfollow someone. Also added unfollow functionality

Description

This PR is linked to the issue I created, #1020 These are the functionalities added

Whenever we click on the follow button now, it asks if we want to follow that person
Added an unfollow functionality
Similar to the follow confirmation, when we click to unfollow, it asks for a confirmation from the user

Related Issue

Fixes #1020

Motivation and Context

This change provides user an option to decide on whether they really want to follow an user and gives them the ability to even unfollow someone, which was initially missing

How Has This Been Tested?

Screenshots or GIF (In case of UI changes):

https://github.com/scorelab/Codelabz/assets/133862694/7015ced9-daea-46ad-9c01-83abf832eef5

Types of changes

[ ] Bug fix (non-breaking change which fixes an issue)
[X] New feature (non-breaking change which adds functionality)
[ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

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

scorelab / Codelabz

Added confirmation modal window whenever user wants to follow and unfollow someone. Also added unfollow functionality #1145