Meshtastic Mcp Configuration

See AGENTS.md — it is the source of truth for architecture, rules, and workflow.

Quick reference for Cursor:
- Core MCP tools always register; firmware/android/apple tools gate on capabilities.detect().
- No firmware-tree assumptions in core modules (use config.firmware_root_or_none()).
- Destructive tools require confirm=True; never bypass the gate.
- One MCP call per serial port at a time (exclusive lock).
- No type debt: mypy with no per-module ignore_errors; ruff clean (no blanket # noqa).
- Pre-push: ruff check + ruff format --check + mypy + pytest tests/unit
- License: GPL-3.0-only; git commit -s (DCO sign-off).