Adds the complete server-side MCP implementation as a NanoClaw
feature skill (nanoclaw-skill/). Includes source code, modification
intents, and step-by-step SKILL.md for installation. README updated
to cover both server (NanoClaw) and client (pi.dev) setup.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>