gh-tea-npm-dsh: A plugin integrating gh, tea, and npm into DSH

`@tommyfang/gh-tea-npm-dsh` is a DeepSeek Harness (DSH) plugin designed to automate the prerequisites for GitHub CLI (`gh`), Gitea CLI (`tea`), and npm package publishing. The tool first detects the current environment and then guides the user through CLI installation, token import, browser OAuth login, or manual token configuration via an interactive menu. Its core features include: 1) Detecting and installing `gh`/`tea`, supporting one-click installation and multiple authentication methods; 2) Providing full lifecycle management for Issues, including listing, viewing, creating, commenting on, closing, and reopening issues; 3) Managing the npm environment, supporting Node.js status detection, login guidance, and npm package publishing.