dropfile

[ddkwork]

I found that there is a simple way to operate file drag-and-drop on the desktop platform, that is, to assert whether the new window interface of the app is not the window pointer of the desktop platform, because there is no drag-and-drop scene on the mobile platform, so what I discussed with you in the PR before: file drag-and-drop through the view of the event manager and suggestions to reduce complexity. For any single-app application, the main window gets a drag-and-drop file that meets a variety of business requirements, and if you accept that suggestion, I'll try to add an interface signature inside goosi's type Window interface to handle drag-and-drop, but I'm not sure if this PR will be created successfully, as I seem to have hit a bit of a snag before

[ddkwork]

I tested a large js file with 40366 lines and found that the code editor widget was stuttering