Adding pagination logic for fetching users in GET /users/search/

Issue Description

In the https://dashboard.realdevsquad.com/users/discord/ all the users are loaded at once and there is no pagination logic

Expected Behavior

Only some users should be fetched depending on how many users can be loaded before scrolled.

Current Behavior

All the users are being fetched at once as soon as the page is loaded

Screenshots

NA

Reproducibility

• This issue is reproducible
• This issue is not reproducible

Steps to Reproduce

1. Go to https://dashboard.realdevsquad.com/users/discord/

Severity/Priority

• Critical
• High
• Medium
• Low

Additional Information

Checklist

• I have read and followed the project's code of conduct.
• I have searched for similar issues before creating this one.
• I have provided all the necessary information to understand and reproduce the issue.
• I am willing to contribute to the resolution of this issue.

Trace the GET /users/search/ handler used by /users/discord/; the issue names no source file or test. First inspect how the endpoint currently fetches users and how the page requests them. Done means users are fetched in bounded batches rather than all at initial page load, according to the scroll position.