Automatic AABBs for render types

Render types: - VelloScene - VelloSvg - VelloLottie - VelloText All should have automated AABBs added on creation. Currently we cannot do this automatically due to limitations of the Vello API. See: https://xi.zulipchat.com/#narrow/channel/197075-vello/topic/Scene.20BB/with/520480143 Current implementation: - [ ] VelloScene - [x] VelloSvg - [x] VelloLottie - [ ] VelloText