tt-cli

Single entry point to the Tenstorrent software stack: `tt update` converges a machine onto the CI-tested "golden" version set, `tt device` covers status/info/reset, and `tt model`/`tt serve` pull weights and bring up tt-inference-server. Commands either run natively or delegate to tt-smi, tt-flash, and tt-installer behind a stable interface, with `--json` output and documented exit codes on every command. Early prototype — the README labels it an internal prototype and several subcommands are still stubs.