feat: Add a stream interception to the onDragOver event

[githubobil]

The Question：
Calls when an element has been dropped into the grid from outside，The trigger frequency of ondragover events is too high, causing the problem of stuck

The Solution:
ondragover adds interception

The Effect

[STRML]

Please don't commit package.json changes and built files.

[avasuro]

Please, keep in mind that inside onDragOver handler end user could do some actions to affect dnd process, e.g. apply e.dataTransfer.dropEffect, which affects visual look of mouse pointer, ability to dop (e.g. prevents drop if set to 'none') and could be used later in onDrop handler.

If onDragOver is throttled - dropEffect will be applied not immediately and this could produce bugs in end-user applications.

So, in my opinion only re-render of grid layout could be trottled to improve performance, but all DnD-related staff (like call of onDragOver handler etc.) should be handled immediately. In other way - there is very high risk of various DnD bugs for the end users.