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/interfaces.ts

@@ -47,8 +47,8 @@ export interface LightConfig {
   intensity: number
 }
 
-export interface EventCallback {
-  (data?: any): void
+export interface EventCallback<T = unknown> {
+  (data: T): void
 }
 
 export interface Load3DOptions {
@@ -128,9 +128,9 @@ export interface ViewHelperManagerInterface extends BaseManager {
 }
 
 export interface EventManagerInterface {
-  addEventListener(event: string, callback: EventCallback): void
-  removeEventListener(event: string, callback: EventCallback): void
-  emitEvent(event: string, data?: any): void
+  addEventListener<T>(event: string, callback: EventCallback<T>): void
+  removeEventListener<T>(event: string, callback: EventCallback<T>): void
+  emitEvent<T>(event: string, data: T): void
 }
 
 export interface AnimationManagerInterface extends BaseManager {
@@ -141,7 +141,10 @@ export interface AnimationManagerInterface extends BaseManager {
   isAnimationPlaying: boolean
   animationSpeed: number
 
-  setupModelAnimations(model: THREE.Object3D, originalModel: any): void
+  setupModelAnimations(
+    model: THREE.Object3D,
+    originalModel: THREE.Object3D | THREE.BufferGeometry | GLTF | null
+  ): void
   updateAnimationList(): void
   setAnimationSpeed(speed: number): void
   updateSelectedAnimation(index: number): void