SVG assets can appear oversized

[dfabulich]

On Slack, Tim Koss reported an issue where SVGs were laying out huge. He sent me an SVG that I used to reproduce the issue, which was caused by #415.

[dfabulich]

I tried fixing this by just removing the .size modifier on Coil's AsyncImage in Image.swift, but stuff started crashing with "Asking for intrinsic measurements of SubcomposeLayout layouts is not supported' errors. (This is why I wrote that funky "size it based on the size of the screen" code to begin with.)

So, instead, I think the best way out is through: we should merge #423 (now that I've fixed the outstanding bug there). SVGs size themselves naturally by default; they can be huge if you switch back to .subcomposeAsyncImage(), or glacially slow (load from disk and decode every SVG on every frame) if you roll back #415. #423 is the best option I see.