Add complete status

[mayura-andrew]

Purpose

The purpose of this PR is to fix #121

Goals

Once the program concludes, the admin should have the ability to update the status of each mentee's application to 'COMPLETE'.

Approach

Creating new separate UI component and use it.

Screenshots

Checklist

• [X] This PR doesn't commit any keys, passwords, tokens, usernames, or other secrets.
• [X] I have read and understood the development best practices guidelines ( http://bit.ly/sef-best-practices )
• [X] My code follows the style guidelines of this project
• [X] I have performed a self-review of my own code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation

Related PRs

## Test environment - OS: Linux Mint 21.3 - Browser Firefox - Version 128.0 ## Learning