Add a drop-down option to mark as the best response

[Procos12]

In this issue, add a drop-down UI component to mark a response as the best response. Originally was #16 but that was too much work.

Estimated Effort:
Finding the right place to add the component in the code will be difficult, however adding such an element should be easy
Around 2 Days

Dependencies:
Depends on #40

Initial assignments for team members:
Assigned to Abdulwahab Al-Rumaihi

Milestones to indicate which sprint the issue should be completed in:
This should be complete by the end of sprint 2

Acceptance criteria:
The checkbox UI component should work(toggle on and off)