dsh-password-prompt: Pop up password panel in DSH Web GUI

The DSH plugin `dsh-password-prompt`, developed by MagicCrazyMan, is designed to address the issue of Agents requesting passwords from users within the DeepSeek Harness (DSH) Web GUI. This plugin provides a `password_prompt` tool that supports either a password-only mode or an "account + password" mode, collecting input via a browser-based pop-up masked panel. For security purposes, passwords are not directly returned to the Agent or included in the model context; instead, they are written to private files. Only the file path and account information are returned, allowing the Agent to execute scripts (e.g., SSH, sudo) using this data. The plugin is released under the MIT license and operates as a dual-end plugin, requiring no modification of the DSH core code. Installation requires using the GitHub repository and configuring build permissions for pnpm 10+. It is recommended to pin the specific commit version.