dsh-plugin-publisher: A DSH Plugin Development and GitHub Release Workflow Plugin

`dsh-plugin-publisher` is a plugin development and GitHub publishing workflow tool for DeepSeek Harness (DSH), licensed under the MIT License, supporting Node.js >=20. It standardizes the packaging, local validation, and publishing processes, eliminating manual steps. Core features include registering the `dsh-plugin-publishing` skill, which covers environment checks, privacy scanning, repository creation, pushing, and validation; and providing a settings card in the DSH Web GUI to manage skill status and store Fine-grained GitHub PATs. The PAT is written only to local credential storage, is never echoed back, and requires read/write permissions for Contents and Administration. The plugin provides the `pnp