Codex 5h/weekly windows (and Anthropic/OpenRouter limits) were only reachable
through the interactive `/usage` slash command, so cron jobs and shell scripts
had no way to read quota state (#33094, #57476). `hermes usage` fetches the
same snapshot through `agent.account_usage.fetch_account_usage` — the credential
resolution a session with no live agent uses — and prints it with the same
renderer; `--json` emits one stable, documented document, exit 1 with a single
stderr line when no credential is configured or the fetch fails.
Slim redo of #81819 (@himanusia): top-level command instead of `hermes auth
usage`, no --all/--account/--reset (the per-entry paths rendered the wrong
account for anthropic and the default path bypassed the runtime resolver).
Co-authored-by: himanusia <himanusia@users.noreply.github.com>
