dsh-browser-bridge: Control/Read Browsers via Local WebSocket

The DeepSeek Harness plugin `dsh-browser-bridge` enables agents to control real browsers via a local WebSocket. It provides 13 model-side tools covering status checks, page reading, interactive operations, and code execution. Installation requires the server-side plugin and a browser extension. It binds to a local address by default and should be used only in trusted environments.