dsh-reading-time: Reading Time Estimation Plugin

`dsh-reading-time` is a lightweight plugin for DeepSeek Harness (DSH) used to locally estimate the reading time of text. It is implemented in pure Node.js and has no network dependencies. Developers can install it with a specified command and, once enabled, invoke the tool in a session to perform calculations. This plugin is suitable for quick local estimation scenarios and is licensed under the MIT License.