Feat: Alt+Drag to clone - Vue Nodes (#6789)

## Summary

Replicate the alt+drag to clone behavior present in litegraph.

## Changes

- **What**: Simplify the interaction/drag handling, now with less state!
- **What**: Alt+Click+Drag a node to clone it

## Screenshots (if applicable)



https://github.com/user-attachments/assets/469e33c2-de0c-4e64-a344-1e9d9339d528



<!-- Add screenshots or video recording to help explain your changes -->

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6789-WIP-Alt-Drag-to-clone-Vue-Nodes-2b16d73d36508102a871ffe97ed2831f)
by [Unito](https://www.unito.io)

---------

Co-authored-by: github-actions <github-actions@github.com>

src/renderer/extensions/vueNodes/composables/useSlotLinkInteraction.ts

@@ -384,6 +384,8 @@ export function useSlotLinkInteraction({
 
   const handlePointerMove = (event: PointerEvent) => {
     if (!pointerSession.matches(event)) return
+    event.stopPropagation()
+
     dragContext.pendingPointerMove = {
       clientX: event.clientX,
       clientY: event.clientY,
@@ -507,6 +509,7 @@ export function useSlotLinkInteraction({
   }
 
   const handlePointerUp = (event: PointerEvent) => {
+    event.stopPropagation()
     finishInteraction(event)
   }