Gemini CLI v0.55.0-nightly internal release

What's Changed

• Changelog for v0.54.0-preview.0 by @gemini-cli-robot in https://github.com/google-gemini/gemini-cli/pull/28567
• Changelog for v0.53.0 by @gemini-cli-robot in https://github.com/google-gemini/gemini-cli/pull/28568
• chore/release: bump version to 0.55.0-nightly.20260729.g3499c84f7 by @gemini-cli-robot in https://github.com/google-gemini/gemini-cli/pull/28573

Full Changelog: https://github.com/google-gemini/gemini-cli/compare/v0.55.0-nightly.20260729.g3499c84f7...v0.55.0-nightly.20260730.gdc859e8e4