App mode - builder toolbar - 6 (#9029)

## Summary

A toolbar for builder mode, hides various UI elements when in builder
mode

## Screenshots (if applicable)

Toolbar
<img width="706" height="166" alt="image"
src="https://github.com/user-attachments/assets/1f0b08b5-1661-4ed5-96bb-feecc73ca701"
/>

With disabled save and output required popover
<img width="711" height="299" alt="image"
src="https://github.com/user-attachments/assets/4a93aaf8-d850-4afe-ab9f-4abd44a25420"
/>

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-9029-App-mode-builder-toolbar-6-30d6d73d365081e3aef5c90033ba347d)
by [Unito](https://www.unito.io)

src/stores/appModeStore.ts

@@ -1,7 +1,7 @@
 import { defineStore } from 'pinia'
 import { readonly, computed, ref } from 'vue'
 
-type AppMode = 'graph' | 'app' | 'builder:select' | 'builder:arrange'
+export type AppMode = 'graph' | 'app' | 'builder:select' | 'builder:arrange'
 
 export const useAppModeStore = defineStore('appMode', () => {
   const mode = ref<AppMode>('graph')