add factory function

index.d.ts

-export class Config {
-    constructor(basePath?: string, envPrefix?: string);
+// Define the shape of the return type of the config function
+interface Config {
   _reload(): void;
   _show(): any;
-    // Index signature
-    [key: string]: any;
+  [key: string]: any; // Index signature for dynamic properties
 }
+
+// Declare the function that returns a Config object
+declare function createConfig(basePath?: string, envPrefix?: string): Config;
+
+// Export the declared function
+export = createConfig;

package.json

 {
   "name": "@libs/config",
-  "version": "1.13.3",
+  "version": "1.13.4",
   "description": "Simple Config with ENV Support",
   "main": "index.js",
   "scripts": {