Function canChangeRole

canChangeRole(
    currentRole: UserRole,
    newRole: UserRole,
    actorRole: UserRole,
): boolean
Validate role transition Checks if a role change is allowed based on business rules
Parameters
- currentRole: UserRole
  Current user role
- newRole: UserRole
  Proposed new role
- actorRole: UserRole
  Role of user making the change
Returns boolean
true if role transition is valid
Example
```
canChangeRole('customer', 'admin', 'superadmin') // true
canChangeRole('admin', 'superadmin', 'admin') // false
```
- Defined in src/lib/utils/permissions.ts:288