feat(module): Improve module exports and compatibility

- Add explicit ES Module and CommonJS exports in index.js
- Update package.json to support both import and require
- Ensure consistent function exports across module systems

package.json

@@ -4,6 +4,12 @@
   "description": "A utility library that provides commonly used functions to simplify everyday development tasks. Whether it's string manipulation, array operations, or other frequent functionalities, `ddmt-tool` helps you work more efficiently.",
   "main": "index.js",
   "type": "module",
+  "exports": {
+    ".": {
+      "import": "./index.js",
+      "require": "./index.js"
+    }
+  },
   "types": "types/index.d.ts",
   "scripts": {
     "dev": "node index.js"