Add Drag and Drop feature

With the help of KONVA.JS

The issue mentions using Konva.js for drag and drop in a Vue project. Look for existing Vue components using Konva in the repository. Research how Konva.js handles drag-and-drop interactions and integrate it with the current image creator components. A working implementation should allow users to drag elements on the canvas.

索引モデルが issue の本文から書いたものです。