[Feature Request] Allow human to create and edit data in Lilac

[songkq]

@HalfdanJ Hi, could you please give some advice for this issue?
When managing the RLHF data, we hope to be able to create and edit data directly in Lilac.
For example, when the original chosen/rejected data are generated by two different LLM, we hope to manually edit the chosen data to align the human preference.