dsh-zai-coding-models: Early integration of GLM-5.3 on the `zai-coding-cn` track

`auuduu/dsh-zai-coding-models` is an MIT-licensed DSH bridge plugin designed to address the issue where the outdated built-in directory in DeepSeek Harness prevents the use of Zhipu's latest model, `GLM-5.3`. This plugin does not modify API keys or endpoint configurations; instead, it supplements the `GLM-5.3` model to the `zai-coding-cn` provider route while retaining the original six bundled models. The added model supports a 1M context window, 128K maximum output, and multiple thinking levels, and forces the reasoning effort parameter to be enabled. Users can install it using the `dsh plugin add` command, requiring a DSH restart to take effect; alternatively, they can choose to manually write the configuration to `~/.`.