Incremental reviews (#181)

<!-- This is an auto-generated comment: release notes by openai -->
### Summary by OpenAI

## Release Notes

Refactor: The `append` and `prepend` methods have been removed from the
`Commenter` class in `commenter.ts`, leaving only the `create` and
`replace` methods. The `mode` parameter has been updated to reflect this
change.

> "Out with the old, in with the new, 
> Commenter's got a fresh review. 
> Append and prepend are no more, 
> Create and replace are what's in store."
<!-- end of auto-generated comment: release notes by openai -->

Author: harjotgill