fix(providers): mark as public

Author: kwaa

packages-ext/providers/package.json

@@ -2,7 +2,6 @@
   "name": "@xsai-ext/providers",
   "type": "module",
   "version": "0.4.0-beta.7",
-  "private": true,
   "description": "extra-small AI SDK.",
   "author": "Moeru AI",
   "license": "MIT",