feat: added tts model

OS/01/assistant/tts.py

@@ -2,5 +2,17 @@
 Defines a function which takes text and returns a path to an audio file.
 """
 
-def tts(text):
-    return path_to_audio
+from openai import OpenAI
+
+client = OpenAI()
+
+def tts(text, file_path):
+
+    response = client.with_streaming_response.audio.speech.create(
+        model="tts-1",
+        voice="alloy",
+        input=text,
+    )
+
+    response.stream_to_file(file_path)
+