SafeMarkdownEditor MCP Server

# MCP Integration Progress - [x] Research latest MCP documentation and best practices - [x] Identify best libraries and components for MCP - [x] Take notes and record findings in scratchpad - [x] Create detailed, actionable MCP API specification in 06-spec.md - [ ] Review and iterate on the specification with feedback - [ ] Begin implementation of MCP server for SafeMarkdownEditor - [ ] Test with official MCP clients and LLMs - [ ] Refine and document based on test results