Add audio example usage

etc/examples/audio.py

@@ -0,0 +1,28 @@
+import asyncio
+from g4f.client import AsyncClient
+import g4f.Provider
+import g4f.models
+
+async def main():
+    client = AsyncClient(provider=g4f.Provider.PollinationsAI)
+
+    # Generate audio with PollinationsAI
+    response = await client.chat.completions.create(
+        model="openai-audio",
+        messages=[{"role": "user", "content": "Say good day to the world"}],
+        audio={ "voice": "alloy", "format": "mp3" },
+    )
+    response.choices[0].message.save("alloy.mp3")
+
+    # Transcribe a audio file
+    with open("audio.wav", "rb") as audio_file:
+        response = await client.chat.completions.create(
+            messages="Transcribe this audio",
+            provider=g4f.Provider.Microsoft_Phi_4,
+            media=[[audio_file, "audio.wav"]],
+            modalities=["text"],
+        )
+        print(response.choices[0].message.content)
+
+if __name__ == "__main__":
+    asyncio.run(main())