dsh-drop-path: Automatically Fill Absolute Paths When Dragging Local Files into DSH

`dsh-drop-path` is a DSH desktop bundle plugin designed to solve the issue where the input box only accepts image attachments. It listens to drag-and-drop events, extracts the real local file paths, and inserts them into the input box while automatically copying them to the clipboard. The plugin provides three modes (automatic, always on, and off), supports files other than images, and uses `stopPropagation` to avoid conflicts with the system’s default drag overlay. After installation, users can conveniently send file paths directly to the model without manual copy-pasting.