dsh-caesar: Caesar Cipher Plugin

dsh-caesar is a local tool plugin for DeepSeek Harness (DSH), maintained by uckkk, implementing the Caesar cipher algorithm with Node.js. It has no network dependencies and focuses on providing basic encryption and decryption capabilities. Users can install it via `dsh plugin add dsh-caesar` and enable it in the profile configuration. After installation, the tool can be directly invoked in DSH sessions for local encoding operations. Note that the plugin runs with the current process permissions; review the source code and license before use.