Export types used by callback props

[stropitek]

For example GetStyleCallback:

export type GetStyleCallback<TData = unknown> = (
  roi: Roi<TData>,
  roiAdditionalState: RoiAdditionalCallbackState,
) => CustomRoiStyle;

Types used by the callback should be exposed by the library.
The roi argument should have a more restricted type that keeps what is useful but does not expose implementation details.