refactor(engine): 字幕引擎文件夹重命名，字幕记录添加降序选择

- 字幕记录表格可以按时间降序排列
- 将 caption-engine 重命名为 engine
- 更新了相关文件和文件夹的路径
- 修改了 README 和 TODO 文档中的相关内容
- 更新了 Electron 构建配置

engine/main-gummy.py

@@ -0,0 +1,58 @@
+import sys
+import argparse
+
+if sys.platform == 'win32':
+    from sysaudio.win import AudioStream
+elif sys.platform == 'darwin':
+    from sysaudio.darwin import AudioStream
+elif sys.platform == 'linux':
+    from sysaudio.linux import AudioStream
+else:
+    raise NotImplementedError(f"Unsupported platform: {sys.platform}")
+
+from audioprcs import mergeChunkChannels
+from audio2text import InvalidParameter, GummyTranslator
+
+
+def convert_audio_to_text(s_lang, t_lang, audio_type, chunk_rate, api_key):
+    sys.stdout.reconfigure(line_buffering=True) # type: ignore
+    stream = AudioStream(audio_type, chunk_rate)
+
+    if t_lang == 'none':
+        gummy = GummyTranslator(stream.RATE, s_lang, None, api_key)
+    else:
+        gummy = GummyTranslator(stream.RATE, s_lang, t_lang, api_key)
+
+    stream.openStream()
+    gummy.start()
+
+    while True:
+        try:
+            chunk = stream.read_chunk()
+            chunk_mono = mergeChunkChannels(chunk, stream.CHANNELS)
+            try:
+                gummy.send_audio_frame(chunk_mono)
+            except InvalidParameter:
+                gummy.start()
+                gummy.send_audio_frame(chunk_mono)
+        except KeyboardInterrupt:
+            stream.closeStream()
+            gummy.stop()
+            break
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(description='Convert system audio stream to text')
+    parser.add_argument('-s', '--source_language', default='en', help='Source language code')
+    parser.add_argument('-t', '--target_language', default='zh', help='Target language code')
+    parser.add_argument('-a', '--audio_type', default=0, help='Audio stream source: 0 for output audio stream, 1 for input audio stream')
+    parser.add_argument('-c', '--chunk_rate', default=20, help='The number of audio stream chunks collected per second.')
+    parser.add_argument('-k', '--api_key', default='', help='API KEY for Gummy model')
+    args = parser.parse_args()
+    convert_audio_to_text(
+        args.source_language,
+        args.target_language,
+        int(args.audio_type),
+        int(args.chunk_rate),
+        args.api_key
+    )