Add async context manager to VoiceClient (#67)

disagreement/voice_client.py

@@ -261,3 +261,18 @@ class VoiceClient:
             self._udp_receive_thread.join(timeout=1)
         if self._sink:
             self._sink.close()
+
+    async def __aenter__(self) -> "VoiceClient":
+        """Enter the context manager by connecting to the voice gateway."""
+        await self.connect()
+        return self
+
+    async def __aexit__(
+        self,
+        exc_type: Optional[type],
+        exc: Optional[BaseException],
+        tb: Optional[BaseException],
+    ) -> bool:
+        """Exit the context manager and close the connection."""
+        await self.close()
+        return False

docs/voice_client.md

@@ -9,15 +9,17 @@ import asyncio
 import os
 import disagreement
 
-vc = disagreement.VoiceClient(
-    os.environ["DISCORD_VOICE_ENDPOINT"],
-    os.environ["DISCORD_SESSION_ID"],
-    os.environ["DISCORD_VOICE_TOKEN"],
-    int(os.environ["DISCORD_GUILD_ID"]),
-    int(os.environ["DISCORD_USER_ID"]),
-)
+async def main():
+    async with disagreement.VoiceClient(
+        os.environ["DISCORD_VOICE_ENDPOINT"],
+        os.environ["DISCORD_SESSION_ID"],
+        os.environ["DISCORD_VOICE_TOKEN"],
+        int(os.environ["DISCORD_GUILD_ID"]),
+        int(os.environ["DISCORD_USER_ID"]),
+    ) as vc:
+        await vc.send_audio_frame(b"...")
 
-asyncio.run(vc.connect())
+asyncio.run(main())
 ```
 
 After connecting you can send raw Opus frames:
@@ -41,7 +43,7 @@ You can switch sources while connected:
 await vc.play(FFmpegAudioSource("other.mp3"))
 ```
 
-Call `await vc.close()` when finished.
+The connection will be closed automatically when leaving the `async with` block.
 
 ## Fetching Available Voice Regions