Road to No Explicit Any Part 5: load3d Module (#8064)

## Summary
- Removes all `any` types from the load3d module
- Uses generics for EventCallback to provide type-safe event handling
- Types node parameters with LGraphNode
- Types onExecuted callback with NodeExecutionOutput
- Types Camera Config property casts with CameraConfig interface

## Changes
- `interfaces.ts`: EventCallback<T> generic, EventManagerInterface
generic methods
- `EventManager.ts`: Generic
emitEvent/addEventListener/removeEventListener
- `AnimationManager.ts`: setupModelAnimations originalModel typed as
GLTF union
- `Load3d.ts`: Event listener methods use EventCallback<T>
- `load3d.ts`: Node params typed as LGraphNode, onExecuted uses
NodeExecutionOutput, CameraConfig casts

## Test plan
- [x] `pnpm typecheck` passes
- [x] `pnpm lint` passes
- [x] `pnpm test:unit` passes

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8064-Road-to-No-Explicit-Any-Part-5-load3d-Module-2e96d73d365081efbc01f2d8a4f3c11f)
by [Unito](https://www.unito.io)

src/extensions/core/load3d/Load3d.ts

@@ -14,6 +14,7 @@ import { ViewHelperManager } from './ViewHelperManager'
 import {
   type CameraState,
   type CaptureResult,
+  type EventCallback,
   type Load3DOptions,
   type MaterialMode,
   type UpDirection
@@ -610,11 +611,11 @@ class Load3d {
     this.forceRender()
   }
 
-  addEventListener(event: string, callback: (data?: any) => void): void {
+  addEventListener<T>(event: string, callback: EventCallback<T>): void {
     this.eventManager.addEventListener(event, callback)
   }
 
-  removeEventListener(event: string, callback: (data?: any) => void): void {
+  removeEventListener<T>(event: string, callback: EventCallback<T>): void {
     this.eventManager.removeEventListener(event, callback)
   }