refactor(go): use i18n grammar engine instead of translation keys
Replace hardcoded i18n.T() key lookups with grammar helpers:
- i18n.Label("test") → "Test:"
- i18n.Progress("install") → "Installing..."
- i18n.ProgressSubject("run", "tests") → "Running tests..."
- i18n.T("i18n.done.pass") → "Passed"
- i18n.T("i18n.fail.install", "binary") → "Failed to install binary"
- i18n.T("i18n.count.check", n) → "5 checks"
The grammar engine computes verb forms (past tense, gerund) and
noun forms (plurals) automatically from built-in tables, eliminating
the need for hundreds of individual translation keys.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>