Add ES module support to fix import compatibility issues

package.json

@@ -3,6 +3,12 @@
   "version": "1.0.8",
   "description": "A simple module for the server-side allowing you to connect to the ChatGPT and receive the response back in chunks so you can stream the response to the user.",
   "main": "index.js",
+  "exports": {
+    ".": {
+      "import": "./index.js",
+      "require": "./index.js"
+    }
+  },
   "scripts": {
     "test": "jest"
   },

test/commonjs-import.test.js

@@ -0,0 +1,21 @@
+// Test CommonJS import in CommonJS context
+const { fetchStreamedChat, fetchStreamedChatContent } = require('../index');
+
+describe('CommonJS imports', () => {
+    test('should export fetchStreamedChat function via require', () => {
+        expect(typeof fetchStreamedChat).toBe('function');
+        expect(fetchStreamedChat.name).toBe('fetchStreamedChat');
+    });
+
+    test('should export fetchStreamedChatContent function via require', () => {
+        expect(typeof fetchStreamedChatContent).toBe('function');
+        expect(fetchStreamedChatContent.name).toBe('fetchStreamedChatContent');
+    });
+
+    test('should have correct function signatures', () => {
+        // fetchStreamedChat should accept 2 parameters
+        expect(fetchStreamedChat.length).toBe(2);
+        // fetchStreamedChatContent should accept 1 parameter (options) with optional callbacks
+        expect(fetchStreamedChatContent.length).toBe(1);
+    });
+});

test/es-import-test.mjs

@@ -0,0 +1,8 @@
+// Simple script to test ES module imports work
+// Run with: node test/es-import-test.mjs
+
+import { fetchStreamedChat, fetchStreamedChatContent } from '../index.js';
+
+console.log('✓ ES module imports working');
+console.log('  fetchStreamedChat:', typeof fetchStreamedChat);
+console.log('  fetchStreamedChatContent:', typeof fetchStreamedChatContent);