dsh-launcher: A lightweight plugin to launch DeepSeek Harness using dsh-go

dsh-launcher is a lightweight plugin for DeepSeek Harness (DSH) designed to enable one-click Web UI launching from the terminal with automatic browser opening. Featuring zero dependencies and a size of approximately 9 KB, the plugin simplifies the workflow by generating the `~/.local/bin/dsh-go` command, replacing complex manual CLI startup steps. It supports installation from npm, GitHub, or a local path, requiring the prerequisite installation of the dsh CLI and pnpm >= 9. The plugin offers flexible configuration via profile patching, covering startup commands, URLs, source code directories, and browser auto-opening behavior, while adhering to a clear command parsing priority. Regarding safety, the plugin backs up existing files and includes error handling for installation failures, ensuring it does not interfere with the harness startup.