dsh-bitrate-choice: Bitrate Choice

`dsh-bitrate-choice` is a DeepSeek Harness plugin maintained by uckkk for bitrate selection. The plugin is MIT licensed, implemented in pure Node.js, requires no network dependencies, supports precise calculations, and returns detailed results. Installation requires `@deepseek-ai/cordis` and `@deepseek-ai/dsh-tools`, and it can be invoked as a tool in a session after installation.