feat: compact output for batch, snapshot, and request

[yusukebe]

The snapshot workflow won on correctness (3/5 → 5/5 on a 27-route refactor) and lost on tokens (262k vs 149k): full bodies printed per route, echoed back through the batch results.

Three opt-in cost controls: hono batch --compact prints only the failed steps and the summary as one-line JSON; hono snapshot --status-only captures status codes without bodies, except the not-found probe line (a dropped notFound handler still answers 404 — only the body changes); hono request --compact drops the headers and prints one line. Logged in docs/agent-dx-log.md.

The author should do the following, if applicable

• Add tests
• Run tests
• pnpm run format:fix && pnpm run lint:fix to format the code
• Add TSDoc/JSDoc to document the code