support Svelte class syntax for objects and arrays #59
Description
Fuz CSS does not fully support Svelte's object+array class syntax, added in 5.16. For now see the tests for the supported forms. Most cases should be workaroundable for now, either in code or through comments as an escape hatch. The current strategy uses a regexp for TS and Svelte files, but we'll probably need to more robustly scan the parsed AST. I'm going to do a pass on nearby code soon, might be a Vite plugin.