[refactor] remove node as dependency in 3d node (#6707)

## Summary

This PR refactors the Load3d 3D rendering system to remove its direct
dependency on LGraphNode, making it a more decoupled and reusable
component. The core rendering engine is now framework-agnostic and can
be used in any context, not just within LiteGraph nodes.

## Changes

1. Decoupled Load3d from LGraphNode
  - Before: Load3d directly accessed node.widgets and node.properties
- After: Load3d accepts optional parameters and callbacks, delegating
node integration to the calling code

2. Event-Driven State Management
  - Removed internal storage from Load3d core components
- Camera, controls, and view helper managers now emit cameraChanged
events instead of directly storing state
- External code (e.g., useLoad3d) listens to events and handles
persistence to node.properties

3. Reactive Dimension Updates

- Introduced getDimensions callback to support reactive dimension
updates
- Fixes the issue where dimension changes in vueNodes mode required a
refresh
- The callback is invoked on every render to get fresh width/height
values

4. Improved Configuration System

- Load3DConfiguration now accepts properties: Dictionary<NodeProperty |
undefined> instead of custom storage
  interface
  - Uses official LiteGraph type definitions (Dictionary, NodeProperty)
  - More semantic parameter naming: storage → properties

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6707-refactor-remove-node-as-dependency-in-3d-node-2ab6d73d365081ffac1cdce354781ce8)
by [Unito](https://www.unito.io)

tests-ui/tests/composables/useLoad3dViewer.test.ts

@@ -161,9 +161,10 @@ describe('useLoad3dViewer', () => {
       await viewer.initializeViewer(containerRef, mockSourceLoad3d)
 
       expect(Load3d).toHaveBeenCalledWith(containerRef, {
-        disablePreview: true,
-        isViewerMode: true,
-        node: mockNode
+        width: undefined,
+        height: undefined,
+        getDimensions: undefined,
+        isViewerMode: true
       })
 
       expect(mockLoad3dService.copyLoad3dState).toHaveBeenCalledWith(