DeepSeek Harness Plugin: Docker Compose Project Management

`dsh-compose-panel` is a DeepSeek Harness plugin designed to integrate Docker Compose projects directly into the native DSH sidebar. It groups projects by directory and provides real-time container status monitoring, start/stop/restart actions, and streaming log viewing. It supports workspace-scoped project discovery, silent refresh, and native style adaptation, helping resolve management clutter in multi-project setups. Installation requires DSH version >= 0.1.5-rc.1 and Docker Compose v2 installed on the host.