dsh-remote: Adding a Remote Access Authentication Layer for DeepSeek Harness

Add account password login, TOTP MFA, signed session cookies, and role-based permissions before the DSH web interface. Replace workspace selection with an in-browser directory dialog. After authentication, allow DSH's originally loopback-only privileged APIs to be accessed. Suitable for scenarios where DSH is exposed to a local network or the internet via a reverse proxy or tunnel. Install with the command: dsh plugin --profile web add @xgone/dsh-remote. MIT license, maintained by xgone.