dsh-text-template: Local Template Rendering

dsh-text-template is a pure Node.js workflow plugin maintained by uckkk that requires no network connection or external services. Its core function is local template rendering. Users can install it with `dsh plugin add github:uckkk/dsh-text-template` and directly invoke its registered tools in a DSH session. Because the plugin runs third-party code locally, users are advised to review the source code before installation. It is especially suitable for structured text processing in offline or network-restricted environments.