IM gateway for DeepSeek Harness agents

Key features

• Give DeepSeek Harness agents a real IM inbox/outbox through Onlyne.
• Set rawTexttrue to send literal text instead of Markdown.
• From any local script, inject an inbound message into the running daemon
• watch on subscribes to the daemon's event stream
• dsh-onlyne is the DeepSeek Harness (dsh) plugin for Onlyne, the workspace-local IM channel daemon.