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/platform/settings/constants/coreSettings.ts

@@ -35,7 +35,7 @@ export const CORE_SETTINGS: SettingParams[] = [
     experimental: true,
     name: 'Node search box implementation',
     type: 'combo',
-    options: ['default', 'litegraph (legacy)'],
+    options: ['default', 'v1 (legacy)', 'litegraph (legacy)'],
     defaultValue: 'default'
   },
   {
@@ -72,7 +72,7 @@ export const CORE_SETTINGS: SettingParams[] = [
     id: 'Comfy.NodeSearchBoxImpl.ShowCategory',
     category: ['Comfy', 'Node Search Box', 'ShowCategory'],
     name: 'Show node category in search results',
-    tooltip: 'Only applies to the default implementation',
+    tooltip: 'Only applies to v1 (legacy)',
     type: 'boolean',
     defaultValue: true
   },
@@ -80,7 +80,7 @@ export const CORE_SETTINGS: SettingParams[] = [
     id: 'Comfy.NodeSearchBoxImpl.ShowIdName',
     category: ['Comfy', 'Node Search Box', 'ShowIdName'],
     name: 'Show node id name in search results',
-    tooltip: 'Only applies to the default implementation',
+    tooltip: 'Does not apply to litegraph (legacy)',
     type: 'boolean',
     defaultValue: false
   },
@@ -88,7 +88,7 @@ export const CORE_SETTINGS: SettingParams[] = [
     id: 'Comfy.NodeSearchBoxImpl.ShowNodeFrequency',
     category: ['Comfy', 'Node Search Box', 'ShowNodeFrequency'],
     name: 'Show node frequency in search results',
-    tooltip: 'Only applies to the default implementation',
+    tooltip: 'Only applies to v1 (legacy)',
     type: 'boolean',
     defaultValue: false
   },
@@ -312,6 +312,13 @@ export const CORE_SETTINGS: SettingParams[] = [
     }
   },
   // Bookmarks are stored in the settings store.
+  {
+    id: 'Comfy.NodeLibrary.NewDesign',
+    name: 'Use new node library design',
+    type: 'hidden',
+    defaultValue: false,
+    experimental: true
+  },
   // Bookmarks are in format of category/display_name. e.g. "conditioning/CLIPTextEncode"
   {
     id: 'Comfy.NodeLibrary.Bookmarks',