docs(mcp): surface KV store on crates.io README + fix error mapping (follow-up to #185)#188

StefanSteiner merged 3 commits into

tableau:maintableau/hyper-api-rust:mainfrom

StefanSteiner:fix/mcp-kv-readme-and-error-mappingStefanSteiner/hyper-api-rust:fix/mcp-kv-readme-and-error-mappingCopy head branch name to clipboard