refactor(caption-engine): 重构字幕引擎代码结构

- 重构 GummyTranslator 类，增加启动和停止方法
- 优化 AudioStream 类，添加读取音频数据方法
- 更新 main-gummy.py，使用新的 GummyTranslator 和 AudioStream 接口
- 更新文档和 TODO 列表

engine-test/process.ipynb

@@ -0,0 +1,82 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "id": "1e12f3ef",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "\n",
+      "        采样设备：\n",
+      "            - 设备类型：音频输入\n",
+      "            - 序号：20\n",
+      "            - 名称：扬声器 (Realtek(R) Audio) [Loopback]\n",
+      "            - 最大输入通道数：2\n",
+      "            - 默认低输入延迟：0.003s\n",
+      "            - 默认高输入延迟：0.01s\n",
+      "            - 默认采样率：48000.0Hz\n",
+      "            - 是否回环设备：True\n",
+      "\n",
+      "        音频样本块大小：2400\n",
+      "        样本位宽：2\n",
+      "        音频数据格式：8\n",
+      "        音频通道数：2\n",
+      "        音频采样率：48000\n",
+      "        \n"
+     ]
+    }
+   ],
+   "source": [
+    "import sys\n",
+    "import os\n",
+    "\n",
+    "current_dir = os.getcwd() \n",
+    "sys.path.append(os.path.join(current_dir, '../caption-engine'))\n",
+    "\n",
+    "from sysaudio.win import AudioStream\n",
+    "\n",
+    "stream = AudioStream()\n",
+    "stream.printInfo()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "d4c8ad80",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "stream.openStream()\n",
+    "SEC = 2\n",
+    "for i in range(SEC * 20):\n",
+    "    data = stream.stream.read(stream.CHUNK) # type: ignore\n",
+    "    "
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "mystd",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.10.12"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}