fix(core): remove selectionchange throttle to avoid selection out of …

[pubuzhixing8]

…sync

[pubuzhixing8]

try to remove throttle.

The real-time collaborative editing scene native selection and editor selection are not synchronized, which may cause the focus to jump when the mouse is clicked. Because native selection and editor selection are not synchronized, the remote operation triggers the toNativeSelection operation, which repositions the native selection, causing the selection of the previous click to become invalid.