dsh-sidecard-ask: DSH Selection Follow-up (Side Card Response)

`dsh-sidecard-ask` is a DeepSeek Harness plugin designed to address the pain point of needing to interrupt the conversation or copy and paste text when asking follow-up questions about selected text. It supports instant streaming responses via a side card when content is selected, offers both a main conversation mode and a standalone sub-agent mode, and includes hotkey triggering, local storage, graceful fallback, and custom chips. Installation requires running commands in the profile directory and configuring the configuration file, while legacy package names need migration. The plugin introduces no external dependencies, and code changes require a restart or refresh.