Support on slot click listeners in vue (#7059)

Adds support for the `node.onInputDblClick` and `node.onInputClick`
callbacks in vue
- Fixes vue link drop code so that a link which is not dropped on the
canvas does not fallback to the dropped on canvas code.

![input-double-click_00001](https://github.com/user-attachments/assets/8b138a6e-e569-4a5d-b59a-cd688ff062e6)

Resolves #7037

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-7059-Support-on-slot-click-listeners-in-vue-2bb6d73d3650812993fdef244e91683b)
by [Unito](https://www.unito.io)

src/renderer/extensions/vueNodes/utils/eventUtils.ts

@@ -0,0 +1,13 @@
+import type { LGraphCanvas } from '@/lib/litegraph/src/LGraphCanvas'
+import type { LGraphNode } from '@/lib/litegraph/src/LGraphNode'
+import type { CanvasPointerEvent } from '@/lib/litegraph/src/types/events'
+
+export function augmentToCanvasPointerEvent(
+  e: PointerEvent,
+  node: LGraphNode,
+  canvas: LGraphCanvas
+): asserts e is CanvasPointerEvent {
+  canvas.adjustMouseEvent(e)
+  canvas.graph_mouse[0] = e.offsetX + node.pos[0]
+  canvas.graph_mouse[1] = e.offsetY + node.pos[1]
+}