feat: add WAV format support for audio chunks in artplayer-plugin-asr

- Implemented pcmToWav function to convert PCM audio data to WAV format.
- Updated onAudioChunk callback to receive both PCM and WAV buffers.
- Modified TypeScript definitions to reflect changes in onAudioChunk parameter and append method.

docs/assets/example/asr.js

@@ -10,8 +10,8 @@ var art = new Artplayer({
             interval: 40,
             sampleRate: 16000,
             autoHideTimeout: 10000,
-            // Use your AI tool to convert buffer into subtitles
-            onAudioChunk: (buffer) => startAsr(buffer),
+            // Use your AI tool to convert pcm/wav into subtitles
+            onAudioChunk: ({ pcm, wav }) => startAsr(pcm),
         }),
     ]
 });