Add tts subpackage

[deanyxu]

• Refactor excepthook_decorator to support customized parameters
• Add a sub-package "tts" (Time To Sleep) for a special use case
• Add description to README

[deanyxu]

Thank you for adding custom parameters and TTS sub package. But I hope you can reduce the directional event descriptions about ‘高端发布会现场’ and ‘大厂技术’ technologies in README, as this package has not really experienced the above events. Add or retain more functional expressions such as "确定性时延".

Good point! I've updated that description