Codex CLI 0.161.0 sets GPT-6.1 Sol as default and adds terminal MCP login

Codex CLI 0.161.0 has been released, setting GPT-6.1 Sol as the default model and adding MCP login directly from the terminal.

The update also introduces a microphone and speaker picker for voice features. Full release details are listed in the [Codex CLI 0.161.0 changelog](https://github.com/openai/codex/releases/tag/rust-v0.161.0).