Merge branch 'css-nesting' of https://github.com/AlbertMarashi/svelte into css-nesting

.changeset/small-kids-switch.md

@@ -2,10 +2,4 @@
 'svelte': patch
 ---
 
-Implement CSS nesting support
-- [x] CSS rule nesting using `&` prefix (ie `.foo { & div { color: red } }`)
-- [x] CSS At-Rules nesting
-- [x] CSS rule nesting without `&` type (element) selector (ie. `.foo { div { color: red } }`)
-- [x] CSS rule nesting without `&` for CSS Combinators (ie. `.foo { + div { color: red } }`)
-- [x] CSS rule nesting without `&` for class & ID selectors (ie. `.foo { .bar { color: red } }`)
-- [x] Appending the `&` nesting selector to reverse rule context (ie. `.foo { .bar & { color: red } }`, equiv to `.bar { .foo { color: red } }`)
+feat: CSS nesting support