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>

packages/shared-frontend-utils/src/formatUtil.ts

@@ -1,3 +1,4 @@
+import { default as DOMPurify } from 'dompurify'
 import type { operations } from '@comfyorg/registry-types'
 
 export function formatCamelCase(str: string): string {
@@ -32,8 +33,15 @@ export function appendJsonExt(path: string) {
   return path
 }
 
-export function highlightQuery(text: string, query: string) {
+export function highlightQuery(
+  text: string,
+  query: string,
+  sanitize: boolean = true
+) {
   if (!query) return text
+  if (sanitize) {
+    text = DOMPurify.sanitize(text)
+  }
 
   // Escape special regex characters in the query string
   const escapedQuery = query.replace(/[.*+?^${}()|[\]\\]/g, '\\$&')