dsh-steam-mop: Steam Mop

The DeepSeek Harness plugin `dsh-steam-mop` focuses on generating home cleaning appliance solutions. The plugin is written in pure Node.js code and runs without network requests. It depends on DeepSeek-related libraries and follows the MIT license. Developers can install it via a command and directly invoke the `steam_mop` tool in a DSH session to obtain relevant solutions.