Floating Menus - UI rework (#5980)

## Summary

Enhancing and further modernizing the UI, giving users more usable area
whilst keeping farmiliar positioning and feel of elements.

## Changes

- **What**: Significant restructure of the UI elements, changing
elements from large blocks to floating elements, updating:
- Side toolbar menu (floating style, supports small/normal mode,
combines to scroll on height overflow)
- Bottom tabs panel (floating style, tabs redesigned)
- Action bar (support for docking/undocking menu)
    - Added login/user menu button to top right
- Restyled breadcrumbs (still collapse when overflows)
- Add litegraph support for fps info position (so it isn't covered by
the sidebar)

- **Breaking**: 
- Removed various elements and added new ones, I have tested custom
sidebars, custom actions, etc but if scripts are inserting elements into
"other" elements they may have been (re)moved.
- Remove support for bottom menu
- Remove support for 2nd-row tabs

## Screenshots 
<img width="1116" height="907" alt="ui"
src="https://github.com/user-attachments/assets/b040a215-67d3-4c88-8c4d-f402a16a34f6"
/>


https://github.com/user-attachments/assets/571dbda5-01ec-47e8-b235-ee1b88c93dd0

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-5980-Floating-Menus-UI-rework-2866d73d3650810aac60cc1afe979b60)
by [Unito](https://www.unito.io)

---------

Co-authored-by: GitHub Action <action@github.com>
Co-authored-by: github-actions <github-actions@github.com>

src/schemas/apiSchema.ts

@@ -415,19 +415,16 @@ const zSettings = z.object({
   'Comfy.Sidebar.Location': z.enum(['left', 'right']),
   'Comfy.Sidebar.Size': z.enum(['small', 'normal']),
   'Comfy.Sidebar.UnifiedWidth': z.boolean(),
+  'Comfy.Sidebar.Style': z.enum(['floating', 'connected']),
   'Comfy.SnapToGrid.GridSize': z.number(),
   'Comfy.TextareaWidget.FontSize': z.number(),
   'Comfy.TextareaWidget.Spellcheck': z.boolean(),
-  'Comfy.UseNewMenu': z.enum(['Disabled', 'Top', 'Bottom']),
+  'Comfy.UseNewMenu': z.enum(['Disabled', 'Top']),
   'Comfy.TreeExplorer.ItemPadding': z.number(),
   'Comfy.Validation.Workflows': z.boolean(),
   'Comfy.Workflow.SortNodeIdOnSave': z.boolean(),
   'Comfy.Queue.ImageFit': z.enum(['contain', 'cover']),
-  'Comfy.Workflow.WorkflowTabsPosition': z.enum([
-    'Sidebar',
-    'Topbar',
-    'Topbar (2nd-row)'
-  ]),
+  'Comfy.Workflow.WorkflowTabsPosition': z.enum(['Sidebar', 'Topbar']),
   'Comfy.Node.DoubleClickTitleToEdit': z.boolean(),
   'Comfy.WidgetControlMode': z.enum(['before', 'after']),
   'Comfy.Window.UnloadConfirmation': z.boolean(),