dsh-plugin-autosshfs: Bring sshfs mounting into the Harness interface and provide the Agent with a tool of the same name.

Maintained by shudingbo, this client plugin for DeepSeek Harness integrates the sshfs mount/unmount capabilities of the command-line autosshfs tool into an independent management page within the Harness main interface, while exposing the same logic to the Agent via the autosshfs tool. It retains the `~/.autosshfs.json` configuration file, allowing existing command-line configurations to be directly reused. Commands are executed via an argv array, mount status is precisely matched against mount points in a mount table, and configuration writing uses atomic operations with fixed permissions set to 0600. It supports Linux and macOS; Windows is not supported. Installation is performed using `plugin_manager` to install the bundle from GitHub, or it can be published to npm to enjoy features such as checking for updates and one-click upgrades.