dsh-code-collector: DeepSeek Harness Session Code Collector

`dsh-code-collector` is a client plugin for DeepSeek Harness (DSH) that addresses the issues of scattered and difficult-to-retrieve code in long sessions. It collects code blocks from conversations into a searchable list, supports grouping by language or file, viewing version history, real-time search, and one-click copy/download. To install it, add the plugin via the command line and configure `package.json`; after restarting, you can manage code resources using the Alt+Shift+C shortcut.