dsh-model-senses: Adding Vision and Web Search Capabilities to the DSH Agent

kinfxhk/dsh-model-senses is a DSH plugin that provides the model_senses tool to the agent via the current deployment's default API. It consists of three actions: see (view images), search (web search), and status (view routes and credentials). It does not introduce new API keys or modify model settings, but directly reuses DSH's configured provider credentials. For xAI, it uses native `web_search`; for other APIs, it uses `ctx.web` and returns a maximum of 8 source URLs, with automatic fallback on failure. Image viewing routes by the order of: same API visual model, deployment default, and other connected APIs. Installation requires DSH version 0.2.1-rc.5 or higher, using `plugin_manager`'s `install_bundle` by specifying an absolute path and restarting. The image size limit is 8 MiB, with timeouts of 120 seconds for 'see' and 180 seconds for 'search'.