dsh-cloakbrowser: Let DSH agent use local CloakBrowser

dsh-cloakbrowser is a local browser session plugin designed specifically for DeepSeek Harness (DSH), maintained by SJF-ECNU. It does not directly distribute the CloakBrowser binary, but connects the locally installed CloakBrowser to DSH, enabling the agent to perform operations such as session management, tab control, page navigation, clicking and inputting, reading and writing Cookies, taking snapshots and screenshots, and explicit visual understanding. The plugin requires a Node.js 22.19+ and Python 3.11+ environment, supports persistent contexts via profile_dir, CDP port exposure, and virtual display on Linux. Users can add, update, or remove the plugin using the `dsh` command, and it needs to be set in DSH...