feat: add .d.ts for @tarojs/extend (based on @types/zepto) (#17796)

* feat: add zepto types

* feat: 新增types文件夹

---------

Co-authored-by: heyongqi10 <[email protected]>

Author: HolyFata

packages/taro-extend/package.json

@@ -5,8 +5,10 @@
   "author": "O2Team",
   "license": "MIT",
   "main": "src/index.js",
+  "types": "types/index.d.ts",
   "files": [
-    "src"
+    "src",
+    "types"
   ],
   "repository": {
     "type": "git",