Add MCP (Model Context Protocol) server/client support

[burner-agent]

Summary

Integrate the Model Context Protocol TypeScript SDK (12k+ stars) to expose Burner's capabilities as MCP tools and consume external MCP servers.

Motivation

MCP is becoming the standard protocol for AI agent tool interoperability. Adding MCP support would let Burner:

• Expose its skills, memory, and workspace operations as MCP tools consumable by other agents
• Connect to external MCP servers (databases, APIs, file systems) without custom integration code
• Participate in the growing ecosystem of MCP-compatible tools

Proposal

• Add @modelcontextprotocol/sdk as a dependency
• Implement an MCP server that exposes: memory CRUD, skill listing, workspace file ops
• Implement an MCP client that can connect to user-configured external MCP servers
• Wire MCP tools into the Claude CLI invocation so the agent can use external tools during RALPH loops

References

• https://github.com/modelcontextprotocol/typescript-sdk
• https://modelcontextprotocol.io