v0.47.0

## What's Changed
* chore(release): bump version to 0.47.0-nightly.20260602.gcfcecebe8 by @gemini-cli-robot in https://github.com/google-gemini/gemini-cli/pull/27644
* Changelog for v0.46.0-preview.0 by @gemini-cli-robot in https://github.com/google-gemini/gemini-cli/pull/27641
* Respect backend definitions for 3.5 flash and Update auto mode to use 3.5 flash when the flag is enabled. by @DavidAPierce in https://github.com/google-gemini/gemini-cli/pull/27645
* fix(policy): add EBUSY fallback and TOML parse recovery (#19919) by @krishdef7 in https://github.com/google-gemini/gemini-cli/pull/21541
* Changelog for v0.45.0 by @gemini-cli-robot in https://github.com/google-gemini/gemini-cli/pull/27642
* update the max amount of times the Antigravity transition banner can be displayed. by @DavidAPierce in https://github.com/google-gemini/gemini-cli/pull/27676
* chore: remove experimental text from browser agent docs by @gsquared94 in https://github.com/google-gemini/gemini-cli/pull/27746
* fix(core): implement atomic update in MCP tool discovery by @luisfelipe-alt in https://github.com/google-gemini/gemini-cli/pull/27619
* Vertex ai model mapping fix by @DavidAPierce in https://github.com/google-gemini/gemini-cli/pull/27749
* Add documentation and migration commands for Antigravity CLI by @DavidAPierce in https://github.com/google-gemini/gemini-cli/pull/27765
* Avoid persisting empty resume sessions by @SandyTao520 in https://github.com/google-gemini/gemini-cli/pull/27770


**Full Changelog**: https://github.com/google-gemini/gemini-cli/compare/v0.46.0...v0.47.0