Make user admin

[Xavilien]

Description

Added feature that allows admins to make users into admins from the admin page, as well as remove them from admin status. Also added a status chip for admins.

Closes #208

Type of change

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

• Run test to add admin by going to /admin → Participants → Profile → Make Admin. Upon successfully making admin, modal should close and new admin status should be reflected as a chip under the status column
• Run test to remove admin by going to /admin → Participants → Profile → Remove Admin. Upon successfully removing admin, modal should close and admin status should be removed under the status column

Test Configuration:

• Node.js version: 18.18.0
• Desktop/Mobile: Macbook Air M2
• OS: Sonoma 14.0
• Browser: Safari

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes