Editor: use more `three/addons/*` alias (#27967)

* Editor: use `three/addons/*` alias

Follow #23406, use more alias in editor

* fix: fix failed imports in last commit

editor/js/Loader.js

@@ -506,7 +506,7 @@ function Loader( editor ) {
 
 					const contents = event.target.result;
 
-					const { PCDLoader } = await import( '../../examples/jsm/loaders/PCDLoader.js' );
+					const { PCDLoader } = await import( 'three/addons/loaders/PCDLoader.js' );
 
 					const points = new PCDLoader().parse( contents );
 					points.name = filename;
@@ -653,7 +653,7 @@ function Loader( editor ) {
 
 					const contents = event.target.result;
 
-					const { USDZLoader } = await import( '../../examples/jsm/loaders/USDZLoader.js' );
+					const { USDZLoader } = await import( 'three/addons/loaders/USDZLoader.js' );
 
 					const group = new USDZLoader().parse( contents );
 					group.name = filename;

editor/js/Viewport.ViewHelper.js

@@ -1,6 +1,6 @@
 import { UIPanel } from './libs/ui.js';
 
-import { ViewHelper as ViewHelperBase } from '../../examples/jsm/helpers/ViewHelper.js';
+import { ViewHelper as ViewHelperBase } from 'three/addons/helpers/ViewHelper.js';
 
 class ViewHelper extends ViewHelperBase {