v0.1.0

Features

• plug <command>: run a local process with cluster DNS and subnets, tunnelled
  through a tiny agent container (sshuttle over ssh, no auth by design)
• Auto-discovery of the overlay subnets from the agent itself
• Profiles in ~/.plug/*.conf with automatic selection (one → used, several →
  interactive choice, none → creation wizard); plug init runs the wizard
• --host/--port flags and $PLUG_HOST/$PLUG_PORT bypass profiles
• Multi-arch agent image (linux/amd64, linux/arm64)