Implement User APIs (Admin)

[IvanoskiHarmonia]

Description:
Create APIs for admin users to manage user permissions and account status.

Tasks:

1. POST/PATCH /users/:id/permissions
   • Change user permissions.
2. POST/PATCH /users/:id/ban
   • Ban a user to prevent authentication.
3. DELETE /users/:id
   • Delete a user's account.

Expected Outcome:
Admin users will have the ability to manage user accounts and permissions through a set of APIs.