refactor: The first refactored version for sdk release (#907)

Co-authored-by: chengfangyin2 <chengfangyin3@jd.com>

dbgpt/util/speech/gtts.py

@@ -0,0 +1,23 @@
+""" GTTS Voice. """
+import os
+
+import gtts
+
+from dbgpt.util.speech.base import VoiceBase
+
+
+class GTTSVoice(VoiceBase):
+    """GTTS Voice."""
+
+    def _setup(self) -> None:
+        pass
+
+    def _speech(self, text: str, _: int = 0) -> bool:
+        """Play the given text."""
+        from playsound import playsound
+
+        tts = gtts.gTTS(text)
+        tts.save("speech.mp3")
+        playsound("speech.mp3", True)
+        os.remove("speech.mp3")
+        return True