Add a 'voice' parameter to the chat-messages API interface.

[conglei1981]

Self Checks

• [x] I have searched for existing issues search for existing issues, including closed ones.
• [x] I confirm that I am using English to submit this report (我已阅读并同意 Language Policy).
• [x] [FOR CHINESE USERS] 请务必使用英文提交 Issue，否则会被关闭。谢谢！:)
• [x] Please do not modify this template :) and fill in all the required fields.

1. Is this request related to a challenge you're experiencing? Tell me about your story.

Add a 'voice' parameter to the chat-messages API interface.

2. Additional context or comments

3. Can you help us with this feature?

• [ ] I am interested in contributing to this feature.