dsh-model-picker-augmented: Enhanced DeepSeek Harness Model Picker

`dsh-model-picker-augmented` is a plugin for DeepSeek Harness (DSH) that enhances the model selection experience with a searchable interface and a settings page. Core features include real-time search filtering, hiding or showing models, pinning frequently used models, and refreshing providers to synchronize local configuration. The plugin must be installed through the Web GUI, persistently saves its configuration, and is compatible with DSH v0.1.5-rc.1 and later.