fix: correct error handling for unknown tools and resources#1389

DePasqualeOrg wants to merge 2 commits intomodelcontextprotocol:mainmodelcontextprotocol/typescript-sdk:mainfrom

DePasqualeOrg:fix/unknown-tool-protocol-errorDePasqualeOrg/mcp-typescript-sdk:fix/unknown-tool-protocol-errorCopy head branch name to clipboard