feat: Update workflow menu to allow quick toggling modes (#9436)

## Summary

Adds a quick toggle mode button to the workflow menu for users to easier
discover & change modes

## Changes

- **What**: 
- remove specific app mode rendering
- increase spacing around breadcrumbs menu
- add current mode text to menu
- add base button variant

## Screenshots (if applicable)

<img width="258" height="137" alt="image"
src="https://github.com/user-attachments/assets/2ed7b276-c52c-44cd-b107-399f769574af"
/>
<img width="233" height="172" alt="image"
src="https://github.com/user-attachments/assets/2639d30c-2150-4434-a86b-732649c4b142"
/>

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-9436-feat-Update-workflow-menu-to-allow-quick-toggling-modes-31a6d73d365081b589eee0e03cd6f1de)
by [Unito](https://www.unito.io)

---------

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

src/components/ui/button/button.variants.ts

@@ -20,6 +20,7 @@ export const buttonVariants = cva({
       'destructive-textonly':
         'bg-transparent text-destructive-background hover:bg-destructive-background/10',
       'overlay-white': 'bg-white text-gray-600 hover:bg-white/90',
+      base: 'bg-base-background text-base-foreground hover:bg-secondary-background-hover',
       gradient:
         'border-transparent bg-(image:--subscription-button-gradient) text-white hover:opacity-90'
     },
@@ -49,6 +50,7 @@ const variants = [
   'textonly',
   'muted-textonly',
   'destructive-textonly',
+  'base',
   'overlay-white',
   'gradient'
 ] as const satisfies Array<ButtonVariants['variant']>