Support for Notifications and Progress sent from the MCP server

Basically opening a issue to get notifications from the server when there is a tool changes or other resource changed. I see that this functionality is already present in the javascript SDK. I can not link to the specific section, but on [javascript mcp-adapter docs](https://reference.langchain.com/javascript/langchain-mcp-adapters) on the Notifications and Progress section is supported. Also for context, I placed here some of the docs referring to this features: Official MCP docs about notifications: https://modelcontextprotocol.io/docs/learn/architecture#notifications and an example from the official docs: https://modelcontextprotocol.io/docs/learn/architecture#understanding-tool-list-change-notifications Also, from fastMCP they provide some features where we need a client that supports this notifications: https://gofastmcp.com/servers/visibility#client-notifications