chore: add deprecation warning for legacy queue/history menu (#9460)

## Summary

Add console.warn deprecation notice when the legacy ComfyList
queue/history menu is instantiated.

## Changes

- **What**: Log a deprecation warning in the `ComfyList` constructor
telling users the legacy menu is deprecated, may break, and won't
receive support. Includes instructions to switch via Settings → "Use new
menu" → "Top".

## Review Focus

Wording of the user-facing console warning.

Fixes #8100 (Phase 1)

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-9460-chore-add-deprecation-warning-for-legacy-queue-history-menu-31b6d73d365081ffa041cad33e8cd9a7)
by [Unito](https://www.unito.io)

---------

Co-authored-by: GitHub Action <action@github.com>
Co-authored-by: Alexander Brown <drjkl@comfy.org>

src/scripts/ui.ts

@@ -245,6 +245,13 @@ class ComfyList {
     this._reverse = reverse || false
     this.element = $el('div.comfy-list') as HTMLDivElement
     this.element.style.display = 'none'
+
+    console.warn(
+      '[ComfyUI] The legacy queue/history menu is deprecated. ' +
+        'Core functionality in this menu may break at any time. ' +
+        'Issues and feature requests related to the legacy menu will not be addressed. ' +
+        'To switch to the new menu: Settings → search "Use new menu" → change from "Disabled" to "Top".'
+    )
   }
 
   get visible() {