Package a complete Windows runtime with codex-zh

[LH-03]

Summary

• require a complete, compatible Windows Codex runtime when packaging the
  localized codex-zh executable;
• include the resource directory, sandbox helper, code-mode host, and rg in
  the ZIP;
• checksum every packaged file and reject archives with missing, unchecked, or
  mismatched runtime files during installation.

Why

The previous release packager emitted a bare Chinese executable. That layout
can start a TUI but fails when Codex needs its Windows sandbox helper.

Validation

• powershell.exe -NoLogo -NoProfile -ExecutionPolicy Bypass -File .\\localization\\test-installer.ps1
• git diff --check
• staged-content scan: no local home paths, credentials, private keys, or email
  addresses