feat(speech): Implement audio playback for streams from the agentscope backend

[qbc2016]

Description

Implement audio playback for streams from the agentscope backend, including:

• Volume control
• Playback speed adjustment

TODO:

• Add playback progress bar

Checklist

Please check the following items before code is ready to be reviewed.

• Code has been formatted with npm run format command in the root directory
• Docstrings/comments are in appropriate style (TSDoc/JSDoc for TypeScript/JavaScript, Google style for Python)
• Related documentation has been updated (e.g. links, examples, etc.)
• Code is ready for review

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