- New mcp_directory.rs: McpCsvLoader to load MCP servers from mcp.csv
- CSV format: name,type,command,args,description,enabled,auth_type,auth_env
- Support for stdio, http, websocket, tcp connection types
- Support for api_key and bearer authentication
- Updated sources/mod.rs with MCP management API endpoints
- New sources/mcp.rs with helper functions
- MCP tools available to Tasks like BASIC keywords
