• I have searched the issues of this repository and believe that this is not a duplicate.

What problem does this feature solve?

Typography editable has two events: onStart, onChange, but in my situation, I need an onCancel/onEnd event too.

This is so I can keep track of whether the element is being edited or not.
In my specific use case, I am replacing \n with <br /> only when the text is not being edited. And when it is being edited, I will not replace the \n characters.

What does the proposed API look like?

An example of editable paragraph:

<Typography.Paragraph
  editable={{
    onStart={() => setIsEditing(true)}
    onEnd={() => setIsEditing(false)} // <- This is the new prop
    onChange={() => setIsEditing(false)}
  }}
>

With onEnd property will fire when the user ends the editing of the field. It could also be onCancel which would only fire when they cancel editing.