Complete Cocos Creator port with level bundles, themes, and tooling.

Adds level prefabs, theme assets, audio, extensions, and deployment scripts for the Unity WebGL migration.

Co-authored-by: Cursor <cursoragent@cursor.com>

extensions/plugin-import-2x/creator/convertor/pac.ts

@@ -0,0 +1,39 @@
+'use strict';
+import { ImporterBase } from '../common/base';
+
+// 2d 自动图集已有的数据
+const KEYS = [
+    'maxWidth',
+    'maxHeight',
+    'padding',
+    'allowRotation',
+    'forceSquared',
+    'powerOfTwo',
+    'algorithm',
+    'format',
+    'quality',
+    'contourBleed',
+    'paddingBleed',
+    'filterUnused',
+];
+
+export class AutoAtlasImporter extends ImporterBase {
+    type: string = 'pac';
+    async import(): Promise<boolean> {
+        if (!this._2dMeta) {
+            return true;
+        }
+        this._3dMeta.ver = '1.0.5';
+        this._3dMeta.importer = 'auto-atlas';
+        for (const key in this._2dMeta) {
+            if (KEYS.includes(key)) {
+                this._3dMeta.userData[key] = this._2dMeta[key];
+            }
+        }
+        const compressSettings = await this.migratePlatformSettings(this._2dMeta.platformSettings);
+        if (compressSettings) {
+            this._3dMeta.userData.compressSettings = compressSettings;
+        }
+        return true;
+    }
+}