API to manipulate cursor and characters

I need:
1- Receive move cursor events.
2- Move cursor to a given index.
3- Handle multiline transparently.
4- Clear the line from ANSI characters, keeping cursor position.

This is applied to the use case commonly found in IDE of automatic colorisation of matching start/end (e.g.: {, [) characters.
This will help wildly CLI users to create nested operations.

I have prototyped this API based on the Buffer class.Buffer usage requires too much complexity.
Should to come-up with a PR that exposes just what is needed.