Verbosity levels

CI pipelines need quiet mode — mytool build --quiet so the log does not balloon with per-file output. Debugging sessions need verbose mode — mytool build -v to see which request failed or which config was loaded. A CLI that only outputs one noise level forces users into either information overload in CI or flying blind during incidents. Registering --verbose but never reading it in handlers is a worse sin: the flag looks supported, users trust it, and it silently does nothing.

Add --verbose/-v and --quiet/-q as global options in src/cli/index.ts and route all logging through a helper that honors them:

program.option('-v, --verbose').option('-q, --quiet')
function log(msg: string, { quiet, verbose }: Opts) {
  if (quiet) return
  console.error(msg)
}
function debug(msg: string, { verbose }: Opts) {
  if (verbose) console.error(`[debug] ${msg}`)
}