Function play_audio

play_audio(audio_clip: AudioClip): AudioClip
Plays the audio clip, and stops when the audio clip is over.
Parameters
- audio_clip: AudioClip
  The AudioClip reference
Returns AudioClip
The AudioClip reference
Example
```
const audioClip = play_audio(create_audio('bgm/GalacticHarmony.mp3', 0.5));
```