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/lib/litegraph/src/LGraphCanvas.ts

@@ -312,6 +312,14 @@ export class LGraphCanvas
     }
   }
 
+  /**
+   * The location of the fps info widget. Leaving an element unset will use the default position for that element.
+   */
+  fpsInfoLocation:
+    | [x: number | null | undefined, y: number | null | undefined]
+    | null
+    | undefined
+
   /** Dispatches a custom event on the canvas. */
   dispatch<T extends keyof NeverNever<LGraphCanvasEventMap>>(
     type: T,
@@ -4698,7 +4706,8 @@ export class LGraphCanvas
 
     // info widget
     if (this.show_info) {
-      this.renderInfo(ctx, area ? area[0] : 0, area ? area[1] : 0)
+      const pos = this.fpsInfoLocation ?? area
+      this.renderInfo(ctx, pos?.[0] ?? 0, pos?.[1] ?? 0)
     }
 
     if (graph) {