Self Checks / 自检

• I have read the FAQ section in README.
  我已阅读 README 中的常见问题。

• I have searched for existing issues, including closed ones.
  我已搜索过已有的 Issue，包括已关闭的。

Related App / 涉及应用

Gemini CLI

Problem or Motivation / 问题或动机

This issue is not a duplication of #1093, which is about the old Antigravity IDE application.

Scenario: Use cc-switch to configure models and skills for Antigravity CLI.

Motivation: Google published Antigravity CLI in I/O keynote a couple hours ago, and announced that Gemini CLI service will end in a month, and all users should migrate to Antigravity CLI.

此问题与 #1093 并非重复，#1093 讨论的是旧版 Antigravity IDE 应用程序。

场景：使用 cc-switch 为 Antigravity CLI 配置模型和技能。

动机：Google 在几个小时前的 I/O 主题演讲中发布了 Antigravity CLI，并宣布 Gemini CLI 服务将于一个月后终止，所有用户都应迁移到 Antigravity CLI。

Proposed Solution / 建议方案

Add support for Antigravity CLI to replace Gemini CLI.

添加对Antigravity CLI的支持，替代Gemini CLI。

Additional Context / 补充信息

Original blog post from Google: https://developers.googleblog.com/an-important-update-transitioning-gemini-cli-to-antigravity-cli/

Google发布的原文链接：https://developers.googleblog.com/an-important-update-transitioning-gemini-cli-to-antigravity-cli/

Contribution / 参与贡献

• I am interested in contributing to this feature.
  我有兴趣参与开发此功能。