dsh-better-plugin-updater: Check and confirm installed plugin updates inside DSH

dsh-better-plugin-updater is a DSH client plugin maintained by Mooling0602. It performs update checks on sources such as npm, GitHub repositories, and GitHub Releases within a managed profile, installing updates only after confirmation via the details page or the `/plugin-updater` command. Based on the official README and package.json, this article explains installation commands, command usage, configuration and GitHub token setup, risks such as the non-atomicity of updates, and the capability boundaries of the `plugin_updates` read-only tool.