@zhangfengshun/dsh-remote-ssh: Integrate Remote SSH Files and Terminals into DSH

The DSH plugin `@zhangfengshun/dsh-remote-ssh` provides functionality similar to VSCode Remote-SSH, allowing users to directly operate remote supercomputers or servers within the DSH built-in interface without needing to synchronize files to the local machine first. The plugin supports SSH connections (including key/password authentication and ProxyJump) and enables direct reading and writing of remote files in the "Files" tab, while automatically entering a remote interactive terminal in the "Terminal" tab (key authentication only). It also supports creating remote native workspaces and provides 12 session-aware `remote_ssh_*` model tools to simplify parameter configuration. Installation requires Node engine >=20, with installation performed via the `dsh plugin add` command followed by restarting DSH, and it must run under bun.