[QPOv2] Add media assets viewmode toggle (#7729)

Adds a button to toggle the view mode of the media assets panel

<img width="530" height="326" alt="image"
src="https://github.com/user-attachments/assets/0946e87d-03b0-4606-9142-ac18aae89ecc"
/>

Part of the QPO v2 iteration, figma design can be found
[here](https://www.figma.com/design/LVilZgHGk5RwWOkVN6yCEK/Queue-Progress-Modal?node-id=3330-37286&m=dev).
This will be implemented in a series of stacked PRs that can be reviewed
and merged individually.

main <-- #7729, #7731, #7737, #7743, #7745

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-7729-QPOv2-Add-media-assets-viewmode-toggle-2d16d73d365081e5b641efce5a5c1662)
by [Unito](https://www.unito.io)

src/platform/settings/constants/coreSettings.ts

@@ -1139,5 +1139,13 @@ export const CORE_SETTINGS: SettingParams[] = [
     type: 'hidden',
     defaultValue: false,
     versionAdded: '1.34.1'
+  },
+  {
+    id: 'Comfy.Queue.QPOV2',
+    name: 'Queue Panel V2',
+    type: 'hidden',
+    tooltip: 'Enable the new Assets Panel design with list/grid view toggle',
+    defaultValue: false,
+    experimental: true
   }
 ]