feat(i18n): per-language help routing and fast-path string micro-optimizations

- Implement is_help_flag and is_version_flag in the C dispatcher using uint64_t
  word loads to optimize string comparison for '--help' and '--version' flags.
- Check for a lightweight marker file (~/.config/omnipkg/lang_marker_en) in both
  the C dispatcher and dispatcher.py to decide when to instantly serve the
  baked English help text.
- Fall back to Python argparse for non-English locales to correctly serve fully
  translated subcommand lists and argument menus.
- Restore translated argument descriptions (removed argparse.SUPPRESS) across
  all subcommands so localized menus render properly on fallback.
- Update .bashrc and .zshrc with OMNIPKG_LANG when the language is changed via
  the config menu to keep settings persistent.
- Ensure i18n.py and worker_daemon.py read the config file directly during early
  initialization so language variables are set before ConfigManager starts.

Modified:
  • src/omnipkg/cli.py (+296/-216 lines)
  • src/omnipkg/dispatcher.c (+44/-8 lines)
  • src/omnipkg/dispatcher.py (+11/-3 lines)
  • src/omnipkg/i18n.py (+11/-1 lines)
  • src/omnipkg/isolation/worker_daemon.py (+7/-1 lines)

[gitship-generated]

Author: 1minds3t