atmukit/antigravity-settings.json ? reverse-engineered prompt

Build me a polished Antigravity IDE settings package that I can drop into my user config and use right away.

I want it to make the editor feel fast and lightweight, cut down on visual clutter, and be tuned for AI coding help with strong context awareness. Keep the interface clean but still usable, with things like a visible activity bar, breadcrumbs, good font settings, autosave, formatting on save, and automatic cleanup for imports and lint fixes. Also include the agent and chat settings that make it easier for the IDE to understand a whole workspace instead of just one file.

Please make the settings.json ready to paste, and make the README clear about how to install it on Linux, macOS, and Windows. If any browser or extension choices could vary by setup, mention that simply so I can swap them if needed. If you need to check current docs online for any setting names, go ahead.