Integrate MCP tools into LlamaIndex

This work has been contributed to upstream llama_index as McpToolSpec in the llama-index-tools-mcp package. You can find the pull request llama_index#17795 feat: add mcp tool spec and try out the example notebook llama-index-tools-mcp/examples/mcp.ipynb directly. This article mainly introduces how to convert MCP (Model Context Protocol) tools into LlamaIndex tools that can be directly used,…