Check if the wheel event is from an element that wants to capture wheel events (#5821)

## Summary

Add generic wheel event capture mechanism for interactive widgets in
vueNodes system to prevent event bubbling to canvas.

  ## Changes

- What: Add event handling logic in LGraphNode.vue and GraphCanvas.vue
that checks for data-capture-wheel attribute to determine whether wheel
events should be forwarded to the canvas
- How it works: Components that need to capture wheel events (like
Three.js scenes) can add data-capture-wheel="true" attribute to prevent
wheel events from bubbling up to the canvas zoom handler

prerequirist for https://github.com/Comfy-Org/ComfyUI_frontend/pull/5765

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-5821-Check-if-the-wheel-event-is-from-an-element-that-wants-to-capture-wheel-events-27b6d73d3650812493b5f13849147e6c)
by [Unito](https://www.unito.io)

src/renderer/extensions/vueNodes/widgets/components/WidgetTextarea.vue

@@ -8,6 +8,7 @@
       :placeholder="placeholder || widget.name || ''"
       size="small"
       rows="3"
+      data-capture-wheel="true"
       @update:model-value="onChange"
     />
     <LODFallback />