dsh-parking-cost: Parking Fee Calculation

The DSH `dsh-parking-cost` plugin is maintained by user uckkk and is designed to provide agents with parking fee calculation capabilities. Installing the plugin requires the dependencies `@deepseek-ai/cordis` version `^4.0.1` and `@deepseek-ai/dsh-tools` version `0.1.0-rc.6` or higher. The plugin is a pure Node.js implementation that registers the `parking_cost` tool, enabling precise parking fee calculation during a session through parameters. The project is open-sourced under the MIT License.