Move dropdown menu into UI package

resources/js/packages/ui/src/dropdown-menu/DropdownMenuSub.vue

@@ -0,0 +1,19 @@
+<script setup lang="ts">
+import {
+    DropdownMenuSub,
+    type DropdownMenuSubEmits,
+    type DropdownMenuSubProps,
+    useForwardPropsEmits,
+} from 'reka-ui';
+
+const props = defineProps<DropdownMenuSubProps>();
+const emits = defineEmits<DropdownMenuSubEmits>();
+
+const forwarded = useForwardPropsEmits(props, emits);
+</script>
+
+<template>
+    <DropdownMenuSub v-bind="forwarded">
+        <slot />
+    </DropdownMenuSub>
+</template>