dsh-paste-dock: Automatically Save Large Text Pastes as Attachments and Manage Them

`dsh-paste-dock` is a DeepSeek Harness (DSH) plugin designed to address context pollution caused by pasting large blocks of text. It intercepts long-text paste operations and automatically saves the content as a file, while providing Dock card management above the input box; the draft area retains only a minimized reference. It supports configurable thresholds, file size limits, and display modes, keeping the input box clean while enabling graceful degradation.