fix:add pagination to get project follower endpoint

[CHRISTOPHERKADOGO]

Description

This PR implements pagination for the project follower's endpoint to improve performance and user experience when dealing with projects that have large numbers of followers.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Trello Ticket ID

Please add a link to the Trello ticket for the task.
[Link to Trello ticket]

How Can This Be Tested?

Test Scenarios:

1. **Basic Pagination Test: **

   GET /projects/{project_id}/following?page=1&per_page=5

   • Verify response contains exactly 5 followers (or fewer if total is less)
   • Check pagination metadata is correct

[rhodinemma]

thank you for this @CHRISTOPHERKADOGO