feat: add MonkeyProof remote-session service

[rodaddy]

Goal

Add a first-class monkeyproof service to mcp2cli so agents can control remote MonkeyProof sessions without hand-rolled curl/WebSocket code.

Context

MonkeyProof is the remote coding-agent session manager for the Herdr/A2A orchestration plan. It exposes REST + WebSocket endpoints, but Codex agents should use a stable mcp2cli service surface for routine operations.

Proposed Tools

• health
• create_session
• list_sessions
• get_session
• send_input
• kill_session
• read_transcript
• stream_session if mcp2cli can support the streaming UX cleanly; otherwise document the fallback.

Requirements

• Service config supports base URL and token via existing mcp2cli secret/config patterns.
• Do not hardcode production tokens.
• Return structured JSON with session id, status, cwd, command/preset, recent output, and exit metadata where available.
• Fail closed on missing credentials or non-2xx responses.
• Include examples for Codex and Claude presets.
• Include at least one read-only smoke test against a dev or documented local MonkeyProof instance.

Acceptance Criteria

• mcp2cli monkeyproof --help lists the tools.
• mcp2cli schema monkeyproof.create_session documents parameters.
• Agent can create, inspect, send input to, and kill a session using only mcp2cli.
• Errors are actionable and do not expose secrets.
• Tests or smoke evidence are included in the PR.

[rodaddy]

Part of the Herdr-controlled remote worker orchestration epic:

• rodaddy/rtech-infra#133

This work should feed the PRD/implementation plan there and be coordinated from a Herdr controller session.