Add MCP Client support for external tool integration

[HeatherFlux]

Add MCP client support for external tool integration

It is just a test to slap in a MCP client using the SDK it would be cooler to take this a step further and get everything going in a simple electron app to have more local focused tooling for anyone who wants to have a private way to use tools. Even adding this as a transport in Cline/Roo or getting it in the AI-SDK that a lot of folks are using would also be cool

• Integrate MCP SDK (io.modelcontextprotocol.sdk:mcp:0.17.0)
• McpClientManager - manages server connections and tool discovery
• McpToolAdapter - wraps MCP tools as the existing Tool interface
• Config: mcp.enabled, mcp.servers.config

Usage

mcp.enabled=true                                                                                                                                          
mcp.servers.config={"servers":[{"name":"fs","transport":"stdio","command":"npx","args":["-y","@modelcontextprotocol/server-filesystem","/tmp"]}]}         
                                                                                                                                                          
Tools namespaced as mcp_<server>_<tool> (e.g. mcp_fs_read_file).