[AICW-110] add mcp documentation for mkdocs

[9and3]

Hello @jspaquet , @Brunner246 ✋

This PR adds documentation for connecting AI coding assistants to the Cadwork Python API documentation via MCP (Model Context Protocol) that I developed specifically for this API, it is FREE for the user since payed already by Cadwork (we use it for other pipelines).

What is MCP? is an open standard (created by Anthropic) that allows AI assistants like Claude, ChatGPT, and GitHub Copilot to connect to external data sources in real-time. Instead of relying solely on their training data, AI models can query specialized servers to get accurate, up-to-date information.

Why is this useful for Cadwork Python API users

This can help explore the documentation, generate code grounded in the API (no hallucinations), and discover features without manually browsing the docs. It's especially great for new users and for generating scripts without errors and guide them through the API, and I truly believe this can boost the use of this wonderful API for Cadwork.

E.g. this can be true golden tool for new users getting familiar to the API for the first time:

#300 (comment)

What's included?

• New documentation page (docs/mcp.md) explaining MCP and its benefits
• Setup instructions for major AI tools: Claude Desktop, Claude Code, ChatGPT, and VS Code (GitHub Copilot)
• Supporting images (MCP icon, ChatGPT setup screenshot)
• Navigation update in mkdocs.yml

Let me know what you think!