Changed
- Convert the `q_business_user_id` configuration as optional to support applications that require AWS IAM Identity Center ([56](https://github.com/awslabs/agent-evaluation/pull/56))
- Changed `TargetResponse` to a top-level import ([57](https://github.com/awslabs/agent-evaluation/pull/57))
Fixed
- Documentation for creating custom targets ([57](https://github.com/awslabs/agent-evaluation/pull/57))