Create MCP server for Claude Chat integration

[PhilflowIO]

Build an MCP (Model Context Protocol) server to enable Claude Chat to trigger migrations via conversation.

Requirements:

• New tools: migrate_calendar, migration_status, migration_preview
• Integration with existing MigrationEngine
• Conversational config setup (instead of JSON files)
• Progress updates via MCP streaming

Example Usage (in Claude Chat):

User: Migrate my Google Calendar to Baïkal
Claude: I'll help you migrate your calendars. First, I need some information:
        1. Google account email?
        2. Baïkal server URL?
        ...

[Uses migrate_calendar tool to execute migration]
[Uses migration_status tool to show progress]

Technical Details:

• Implement as separate package: dav-migrate-mcp
• Use @modelcontextprotocol/sdk
• Reuse core logic from dav-migrate

Estimated Effort: Medium (4-5 days)

Related to: DAV Migration CLI - Phase 3