feat: auto scroll when dragging

[andrewdoro]

Describe the feature you'd like to request

Implement auto scroll when dragging. Currently dragging in based on the native HTML integration.

novel-drag.mp4

Added this PR for an example implementation but I am not confident is a good solution #340

Describe the solution you'd like to see

• auto scroll based on acceleration and speed
• customizable speed
• take into account scroll container not being the window object

I've seen this solution in dnd-kit but needs to be adpated for our use case with Tiptap:
https://github.com/clauderic/dnd-kit/blob/694dcc2f62e5269541fc941fa6c9af46ccd682ad/packages/core/src/hooks/utilities/useAutoScroller.ts#L4

Additional information

No response