ci: update rollup.config.ts

Author: JaonZhao

package.json

@@ -53,6 +53,7 @@
     "@rollup/plugin-typescript": "^12.1.2",
     "@types/node": "^22.13.4",
     "rollup": "^4.35.0",
+    "rollup-plugin-copy": "^3.5.0",
     "rollup-plugin-terser": "^7.0.2",
     "tslib": "^2.8.1",
     "typescript": "^5.7.3",