Add figma-style dragging on editor

[peculiarnewbie]

for now i just added it to the size input field

the first commit is a naive implementation where you just change the input value on drag. It's very expensive because of all the side effects on those input fields changing

the second commit is implemented using the existing editor drag function, altoughi had to add minor changes outside of the component itself

[peculiarnewbie]

moved implementation directly on EditorShift.svelte

now also works with rotation and ordinary