V2 Node Search (+ hidden Node Library changes) (#8987)

## Summary

Redesigned node search with categories

## Changes

- **What**: Adds a v2 search component, leaving the existing
implementation untouched
- It also brings onboard the incomplete node library & preview changes,
disabled and behind a hidden setting
- **Breaking**: Changes the 'default' value of the node search setting
to v2, adding v1 (legacy) as an option

## Screenshots (if applicable)




https://github.com/user-attachments/assets/2ab797df-58f0-48e8-8b20-2a1809e3735f

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8987-V2-Node-Search-hidden-Node-Library-changes-30c6d73d36508160902bcb92553f147c)
by [Unito](https://www.unito.io)

---------

Co-authored-by: Yourz <crazilou@vip.qq.com>
Co-authored-by: Amp <amp@ampcode.com>
Co-authored-by: github-actions <github-actions@github.com>
Co-authored-by: GitHub Action <action@github.com>
Co-authored-by: Christian Byrne <cbyrne@comfy.org>

src/components/common/SearchBoxV2.vue

@@ -0,0 +1,117 @@
+<template>
+  <div class="flex flex-col gap-2 flex-auto">
+    <ComboboxRoot :ignore-filter="true" :open="false">
+      <ComboboxAnchor
+        :class="
+          cn(
+            'relative flex w-full cursor-text items-center',
+            'rounded-lg bg-comfy-input text-comfy-input-foreground',
+            showBorder &&
+              'border border-solid border-border-default box-border',
+            sizeClasses,
+            className
+          )
+        "
+      >
+        <i
+          v-if="!searchTerm"
+          :class="cn('absolute left-4 pointer-events-none', icon, iconClass)"
+        />
+        <Button
+          v-else
+          class="absolute left-2"
+          variant="textonly"
+          size="icon"
+          :aria-label="$t('g.clear')"
+          @click="clearSearch"
+        >
+          <i class="icon-[lucide--x] size-4" />
+        </Button>
+
+        <ComboboxInput
+          ref="inputRef"
+          v-model="searchTerm"
+          :class="
+            cn(
+              'size-full border-none bg-transparent text-sm outline-none',
+              inputPadding
+            )
+          "
+          :placeholder="placeholderText"
+          :auto-focus="autofocus"
+        />
+      </ComboboxAnchor>
+    </ComboboxRoot>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { cn } from '@/utils/tailwindUtil'
+import { watchDebounced } from '@vueuse/core'
+import { ComboboxAnchor, ComboboxInput, ComboboxRoot } from 'reka-ui'
+import { computed, ref } from 'vue'
+import { useI18n } from 'vue-i18n'
+
+import Button from '@/components/ui/button/Button.vue'
+
+const { t } = useI18n()
+
+const {
+  placeholder,
+  icon = 'icon-[lucide--search]',
+  debounceTime = 300,
+  autofocus = false,
+  showBorder = false,
+  size = 'md',
+  class: className
+} = defineProps<{
+  placeholder?: string
+  icon?: string
+  debounceTime?: number
+  autofocus?: boolean
+  showBorder?: boolean
+  size?: 'md' | 'lg'
+  class?: string
+}>()
+
+const emit = defineEmits<{
+  search: [value: string]
+}>()
+
+const searchTerm = defineModel<string>({ required: true })
+
+const inputRef = ref<InstanceType<typeof ComboboxInput> | null>(null)
+
+defineExpose({
+  focus: () => {
+    inputRef.value?.$el?.focus()
+  }
+})
+
+const isLarge = computed(() => size === 'lg')
+const placeholderText = computed(
+  () => placeholder ?? t('g.searchPlaceholder', { subject: '' })
+)
+
+const sizeClasses = computed(() => {
+  if (showBorder) {
+    return isLarge.value ? 'h-10 p-2' : 'h-8 p-2'
+  }
+  return isLarge.value ? 'h-12 px-4 py-2' : 'h-10 px-4 py-2'
+})
+
+const iconClass = computed(() => (isLarge.value ? 'size-5' : 'size-4'))
+const inputPadding = computed(() => (isLarge.value ? 'pl-8' : 'pl-6'))
+
+function clearSearch() {
+  searchTerm.value = ''
+}
+
+watchDebounced(
+  searchTerm,
+  (value: string) => {
+    emit('search', value)
+  },
+  { debounce: debounceTime }
+)
+</script>