feat: add timeout support to browser sendMessage

src/chatgpt-api-browser.ts

 import delay from 'delay'
 import html2md from 'html-to-md'
+import pTimeout from 'p-timeout'
 import type { Browser, HTTPRequest, HTTPResponse, Page } from 'puppeteer'
 
 import { getBrowser, getOpenAIAuth } from './openai-auth'
@@ -275,7 +276,14 @@ export class ChatGPTAPIBrowser {
     }
   }
 
-  async sendMessage(message: string): Promise<string> {
+  async sendMessage(
+    message: string,
+    opts: {
+      timeoutMs?: number
+    } = {}
+  ): Promise<string> {
+    const { timeoutMs } = opts
+
     const inputBox = await this._getInputBox()
     if (!inputBox) throw new Error('not signed in')
 
@@ -294,6 +302,8 @@ export class ChatGPTAPIBrowser {
       }
     }
 
+    const responseP = new Promise<string>(async (resolve, reject) => {
+      try {
         do {
           await delay(1000)
 
@@ -303,10 +313,21 @@ export class ChatGPTAPIBrowser {
             newLastMessage &&
             lastMessage?.toLowerCase() !== newLastMessage?.toLowerCase()
           ) {
-        await delay(5000)
-        return newLastMessage
+            return resolve(newLastMessage)
           }
         } while (true)
+      } catch (err) {
+        return reject(err)
+      }
+    })
+
+    if (timeoutMs) {
+      return pTimeout(responseP, {
+        milliseconds: timeoutMs
+      })
+    } else {
+      return responseP
+    }
   }
 
   async resetThread() {