Upgrade: Tailwind v4 (#5246)

* temp: move tailwind calls out of the layer

* temp: ts tailwind config

* upgrade: Tailwind v4
This got a little out of hand.
Had to add a relative reference to the stylesheet in any component that uses @apply instead of the utility classes directly.

* upgrade: bg-opacity is now a modifier

* fix: Classic menu buttons assume a border

* Update test expectations [skip ci]

* fix: New preflight removal pattern

* fix: Skeletons don't have skin

* Update test expectations [skip ci]

* fix: Missing @reference

* [auto-fix] Apply ESLint and Prettier fixes

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src/components/graph/widgets/TextPreviewWidget.vue

@@ -5,7 +5,7 @@
     <div class="flex items-center gap-2">
       <div class="flex-1 break-all flex items-center gap-2">
         <span v-html="formattedText"></span>
-        <Skeleton v-if="isParentNodeExecuting" class="!flex-1 !h-4" />
+        <Skeleton v-if="isParentNodeExecuting" class="flex-1! h-4!" />
       </div>
     </div>
   </div>