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

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

dbgpt/util/speech/macos_tts.py

@@ -0,0 +1,21 @@
+""" MacOS TTS Voice. """
+import os
+
+from dbgpt.util.speech.base import VoiceBase
+
+
+class MacOSTTS(VoiceBase):
+    """MacOS TTS Voice."""
+
+    def _setup(self) -> None:
+        pass
+
+    def _speech(self, text: str, voice_index: int = 0) -> bool:
+        """Play the given text."""
+        if voice_index == 0:
+            os.system(f'say "{text}"')
+        elif voice_index == 1:
+            os.system(f'say -v "Ava (Premium)" "{text}"')
+        else:
+            os.system(f'say -v Samantha "{text}"')
+        return True