~~work in progress. not ready for review. made for visibility only, but feel free to comment :)~~ TODO: - [x] add close/min/max buttons (to be rendered with gpui) - [x] snap layout support - [x] fix issues with clicking items in titlebar - [x] cleanup/document Release Notes: - Added custom windows titlebar  --------- Co-authored-by: Mikayla <mikayla@zed.dev>