Support Codex

[zhenya-zhu]

Summary

This PR adds native Codex support to CCBot and refines the Telegram/tmux UX so Claude Code and Codex behave correctly as separate runtimes.

What changed

• add native Codex runtime support based on Codex hooks and native transcript parsing
• add runtime selection plumbing across config, startup, hook install, session registration, and monitoring
• resolve Codex sessions from ~/.codex metadata and transcripts instead of Claude-specific paths
• add runtime-aware menus and text so Claude Code and Codex show different Telegram commands and descriptions
• make Codex use /status in the menu and add /plan to the visible Codex command set
• remove /model, /help, /cost, and /memory from the Codex menu while still allowing them to be forwarded when typed manually
• keep Claude /kill as hard-kill behavior, but make Codex /kill send /exit before hard-killing the tmux window
• improve Codex interactive UX by supporting request_user_input prompts, inline option selection, notes flow, and prompt state cleanup
• improve interactive status polling so Codex modals and prompt transitions refresh correctly in Telegram
• add runtime-specific parsing for Codex terminal UI and transcript events
• update README, README_CN, and .env.example with Codex setup, hook setup, and runtime-specific command behavior

Testing

• add and update tests for config, main, hook installation, session registration, session monitoring, transcript parsing, terminal parsing, command forwarding, kill behavior, and Codex interactive UI flows
• verified runtime-specific menu behavior and Codex prompt handling with automated tests
• Mannually tested create new codex session, talking to bot, bot answer normally and answer with selection, selection picking, and some commands for Codex. So the Codex function is basically works
• Resuming, unbinding functions are not tested mannually, need maintainer's help, I'm not family with tmux