chore(framework): TS 测试基建(tsx+node:test) + core 常量

- 补 @types/node（tsconfig types:[node] 所需，原计划遗漏）
- tsconfig 加 allowImportingTsExtensions（import 带 .ts 后缀所需）
- test:framework 改用 run-framework-tests.mjs 递归枚举（node 20.13 <20.14 不支持 --test glob）

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

cocoscreator_projects/package.json

@@ -8,6 +8,13 @@
     "setup-links": "node scripts/setup-links.mjs",
     "new-game": "node scripts/new-game.mjs",
     "check-cocos": "node scripts/check-cocos-version.mjs",
-    "bump-cocos": "node scripts/bump-cocos.mjs"
+    "bump-cocos": "node scripts/bump-cocos.mjs",
+    "test:framework": "node scripts/run-framework-tests.mjs",
+    "typecheck:framework": "tsc -p tsconfig.framework.json --noEmit"
+  },
+  "devDependencies": {
+    "@types/node": "^26.0.1",
+    "tsx": "^4.22.4",
+    "typescript": "^6.0.3"
   }
 }