refactor(i18n): migrate all pkg/* to grammar engine
Replace verbose map-based translation calls with concise grammar
engine helpers across all command packages:
- i18n.T("common.label.xxx") → i18n.Label("xxx")
- i18n.T("common.error.failed", map) → i18n.T("i18n.fail.verb", subj)
- i18n.T("common.progress.running", map) → i18n.ProgressSubject()
- i18n.T("common.count.xxx", map) → i18n.T("i18n.count.xxx", n)
Packages updated: ai, ci, dev, docs, php, pkgcmd, sdk, setup, test, vm
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>