chore: clean up a bunch of legacy styles (#5973)

* remove unused experimental-styles-within

* remove unused styles

* more cleanup + prepr

* Refactor nearly all legacy buttons to use ButtonStyled

* prepr

* Update MC account selector to modern version

* prepr

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Co-authored-by: Calum H. <calum@modrinth.com>

packages/ui/src/components/search/SearchFilterControl.vue

@@ -1,5 +1,5 @@
 <template>
-	<div class="experimental-styles-within flex flex-wrap items-center gap-1 empty:hidden">
+	<div class="flex flex-wrap items-center gap-1 empty:hidden">
 		<TagItem
 			v-if="selectedItems.length > 1"
 			class="transition-transform active:scale-[0.95]"