dsh-audio-bitrate: A Precise Audio Bitrate Calculation Plugin

`dsh-audio-bitrate` is a plugin for DeepSeek Harness (DSH) that provides agents with local audio bitrate calculation capabilities without network requests. The plugin focuses on accurately calculating audio parameters in a pure Node.js environment with high execution efficiency. Users need to install and configure the required dependencies, then invoke the `audio_bitrate` tool in a DSH session to use it. The plugin is suitable for audio parameter analysis scenarios, runs with the permissions of the current process, and its source code is released under the MIT license.