Feature request: image upload on drop

[WhiteSage]

When the Image extension is included, handle the handleDrop tiptap event to automatically upload an image and insert it when the image file is dragged onto the editor.

[yikoyu]

Regarding the drag-and-drop image upload feature, we might consider directly using the new VFileUpload component from Vuetify v3.7.6. However, VFileUpload is currently in the labs phase, and we plan to support this feature once it becomes more stable.